35 th Meeting of the section Atomic Molecular and Optical Physics (AMO) Program and abstracts CongresHotel De Werelt Lunteren October 11 and 12 2011 Scientific Commitee: Giel Berden • Martin van Exter • Ronald Hanson Ronnie Hoekstra • Gert 't Hooft • Femius Koenderink Servaas Kokkelmans • Leo Meerts (chair) • Herman Offerhaus Robert Spreeuw • Peter van der Straten • Wim Vassen • Caspar van der Wal This meeting is organized under the auspices of the NNV-section Atomic, Molecular and Optical Physics, with financial support of the Dutch Science Foundation and the Foundation FOM. Conference coordination: Erna Gouwens (RU)
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35th Meeting of the sectionAtomic Molecular and Optical Physics (AMO)
Program and abstracts
CongresHotel De WereltLunteren
October 11 and 12 2011
Scientific Commitee:
Giel Berden • Martin van Exter • Ronald Hanson
Ronnie Hoekstra • Gert 't Hooft • Femius Koenderink
Servaas Kokkelmans • Leo Meerts (chair) • Herman Offerhaus
Robert Spreeuw • Peter van der Straten • Wim Vassen • Caspar van der Wal
This meeting is organized under the auspices of the NNV-section Atomic, Molecular and Optical Physics,
with financial support of the Dutch Science Foundation and the Foundation FOM.
Conference coordination:
Erna Gouwens (RU)
2
Tuesday 11 October 2011
10.00 Arrival, registration
10.40 Opening by the chair man of the section AMO Leo Meerts
chair Dries van Oosten
10.45 I1 Martin Weitz (Quantum Optics Group, University of Bonn, Germany)
“Bose-Einstein condensation of light”
11.30 Short lectures: (Europa room)
O1 W. Lewoczko-Adamczyk (Van der Waals – Zeeman Institute,
University of Amsterdam)
“Bose-Einstein condensation in microgravity”
O2 S.B. Koller (University of Utrecht)
“Spin drag in a Bose gas”
O3 R. Gerritsma ( Quantum Optics and Spectroscopy, University Innsbruck,
Austria)
“Digital quantum simulation with trapped ions.”
O4 E.J. Salumbides (Laser Centre VU University Amsterdam)
“Test of QED in the ground electronic rotational sequence of the hydrogen
molecule”
12.30 Lunch
chair Martin van Exter
14.00 I2 Allard Mosk (Institute for Nanotechnologie, University of Twente)
Scattering lens resolves nanostructure
14.45 Short lectures: (Europa room)
O5 S.R. Huisman (Institute for Nanotechnologie, University of Twente)
“Near-field investigation of localized modes in slow-light photonic crystal
waveguides”
O6 Martin Frimmer (FOM Institute AMOLF)
“Signature of electromagnetically induced transparency in a plasmonic
molecule’s local density of optical states”
O7 T. Denis (Laser Physics and Nonlinear Optics, University of Twente)
O9 Thijs Meijer (Eindhoven University of Technology)
“Using atom lithography to create magnetic nanostructures.”
O10 Jelmer J. Renema (Leiden University)
“Full characterization of NbN Nanodetectors”
chair Giel Berden
16.45 Poster Introduction – 1 minute per poster
18.00 Dinner (restaurant) (attach posters)
19.15 Poster presentations (Europa room, please remove posters after
the evening lecture )
21.15 Evening lecture chair Leo Meerts
Rob van Dorland (Royal Netherlands Meteorological Institute)
“The human factor in Climate Change”
POSTERS AND ORAL PRESENTATIONS
For oral contributions we have a limited time of 12 minutes per presentation (+3 minutes for discussion).
The posters can be placed before or during the dinner.
Befor 24.00 hr all posters must be removed.(The room will be cleaned)
4
Wednesday 12 October 2011
08.00 Breakfast (restaurant, please remove the luggage from your room)
chair Giel Berden
08.45 I3 Thomas R. Rizzo (Ecole Polytechnique Fédérale de Lausanne (EPFL),
Switzerland)
“Spectroscopy of biological molecules in cold ion traps: examples, challenges
and perspectives”
09.30 Short talks (Europa room)
O11 Sander Jaeqx (FOM Insitute Rijnhuizen)
“The Far-Infrared region as probe for the secondary structure of peptides”
O12 Erik Garbacik (Optical Sciences Group, University of Twente)
“Background-free nonlinear microspectroscopy with vibrational molecular
interferometry”
O13 Frans R. Spiering (Molecular and Biophysics, IMM Radboud University
Nijmegen)
“Absorption by molecular oxygen in the atmospheric bands”
O14 Vivike Lapoutre (FOM Institute Rijnhuizen)
“Probing the adsorption of carbon monoxide on transition metal clusters using
IR photodissociation spectroscopy”
10.30 Coffee/tea break
chair Wim Vassen
11.00 I4 Robert J. Spreeuw (Van der Waals – Zeeman Institute, University of
Amsterdam)
“Lattices of atom microtraps on magnetic-film atom chips”
11.45 Short talks (Europa room)
O15 C.K. Bishwakarma (Molecular and Laserphysics, IMM Radboud University
Nijmegen)
“Differential cross section measurement for Inelastic scattering of CO
with Ar/He”
5
Wednesday 12 October 2011
O16 Rienk T. Jongma (Molecular and Biophysics, IMM Radboud University
Nijmegen)
“FELIX user facility Nijmegen: advanced MIR/FIR sources”
O17 Paul Jansen (Laser Centre VU University Amsterdam)
“Intergalactic alcohol for detecting drifting constants”
O18 Wouter Engelen (Eindhoven University of Technology)
“Ultrashort electron bunches from an ultracold electron source”
12.45 Lunch
chair Peter van der Straten
13.55 Presentation winner poster award
14.00 Short talks (Europa room)
O19 Hannes Bernien (Kavli Institute of Nanoscience, Delft University)
“High-fidelity projective readout of a solid-state quantum register”
O20 O. Gonzalez-Magaña (KVI University of Groningen)
“The effect of peptide length on VUV photofragmentation”
14.40 I5 Chris Monroe (Joint Quantum Institute and University of Maryland USA)
“Quantum networks of trapped ions”
15.20 Finish
6
Poster ProgramP1 Real-time breath analysis by Optical Parametric Oscillator based Off-Axis integrated cavity
output spectroscopyDenis D. Arslanov • Molecular and Laser Physics, IMM Radboud University Nijmegen
P2 Novel searches for cosmological variation of the proton-to-electron mass ratio from high-redshift H2 absorbers in quasar spectra.Julija Bagdonaite • VU University Amsterdam
P3 IR Structural Characterization of Transition Metal Carbene Cations: Ta, W, Ir, PtJoost Bakker • FOM Rijnhuizen
P4 Background-free and Doppler-reduced direct frequency comb spectroscopy of Rubidium atoms using coherent control.I. Barmes • VU University Amsterdam
P5 Large-Area Pulsed Laser Deposition of thin films with atomic precisionH.M.J. Bastiaens • Mesa+ Institute for Nanotechnology, University of Twente
P6 Up-scaling high-harmonic generation in a capillaryH.M.J. Bastiaens • Mesa+ Institute for Nanotechnology, University of Twente
P7 Reflectance Tuning at Extreme Ultraviolet (EUV) Wavelengths with Active Multilayer MirrorsMuharrem Bayraktar • Mesa+ Institute for Nanotechnology, University of Twente
P8 Deceleration and trapping of heavy diatomic molecules for precision measurementsJ.E. van den Berg • KVI Atomic Physics, University of Groningen
P9 Rydberg CrystalsR.M.W. van Bijnen • Eindhoven University of Technology
P10 Velocity map Imaging study of the photodissociation of X–O2 (X = Xe, C2H4 and C6H6): O(1D) detectionBin Yan • Molecular and Laser Physics, IMM Radboud University Nijmegen
P11 Electron transfer in collisions of highly charged ions with Na(3s) and Na*(3p)I. Blank • KVI, Atomic Physics, University of Groningen
P12 Spin drag in a Bose GasP.C. Bons • Nanophotonics University of Utrecht
P13 Two- and three-body loss of spin-polarized metastable helium atoms in an optical dipole trapJ.S. Borbely • VU University Amsterdam
P14 Ethylene detection quantum cascade laser based OFF-AXIS integrated cavity output spectroscopy Raymund Centeno • Molecular and Laser Physics, IMM Radboud University Nijmegen
P15 Coherent control in single-crystalline gold nanoantennasTing Lee Chen • Mesa+ Institute for Nanotechnology, University of Twente
P16 Optimization of the current extracted from an ultracold ion source (UCIS)N. Debernardi • Eindhoven University of Technology
P17 EF1Σg+ - X1Σg
+ two-photon precision studies in hot H2G.D. Dickenson • VU University Amsterdam
P18 Femtosecond pump-probe coincidence imaging in molecular photodynamics studies Mohammad Fanood • VU University Amsterdam
P19 Unraveling the electronic structure of monodehydrogenated PAH ions with FELIXHéctor Alvaro Galué • FOM Rijnhuizen
P20 Stability study of high-harmonic generation in a capillary for seeding of free-electron lasersS.J. Goh • Mesa+ Institute for Nanotechnology, University of Twente
P21 Pump-probe photofragmentation of a trapped isolated peptideO. Gonzalez-Magaña • KVI Atomic Physics, University of Groningen
7
Poster ProgramP22 First and second sound in a weakly interacting Bose gas
A. Groot • Nanophotonics University of UtrechtP23 Spectroscopic evidence for oxazolone structures in anionic b-type peptide fragments
Josipa Grzetic • FOM RijnhuizenP24 Laboratory study of Rayleigh-Brillouin scattering for measuring the winds of the Earth
Z. Gu • VU University AmsterdamP25 Sensitive fluorescence detection using a camera from the gaming industry
B.L. Van Hoozen • Mesa+ Institute for Nanotechnology, University of TwenteP26 Structure and magnetism of terbium clusters
Jeroen Jalink • Spectroscopy of Solids and Interfaces, IMM Radboud UniversityP27 Towards an ultracold mixture of metastable helium and rubidium
Steven Knoop • VU University AmsterdamP28 SuperGPS through optical networks’ for fundamental science and innovation
J.C.J. Koelemeij • VU University AmsterdamP29 Molecular hydrogen ions, the proton-electron mass ratio and the proton size
J.C.J. Koelemeij • VU University AmsterdamP30 Discovery of electron-hole Cooper pairs in a semiconductor
A.J. van Lange • Debye Institute for NanoMaterials Science, University of UtrechtP31 Compact/Low Power RF Technology for Time Resolved Electron Microscopy
A. Lassise • Eindhoven University of TechnologyP32 Photoelectron-photoion coincidence imaging of ultrafast control in multichannel molecular
dynamics.Carl Stefan Lehmann • VU University Amsterdam
P33 Lattices of atom microtraps on magnetic-film atom chipsV.Y.F. Leung • Van der Waals-Zeeman Instituut, University of Amsterdam
P34 Towards Bose-Einstein condensation in a 1D box on an atom chipW. Lewoczko-Adamczyk • Van der Waals-Zeeman Instituut, University of Amsterdam
P35 CO ice photodesorption; a wavelength-dependent studyHarold Linnartz • Sackler Laboratory for Astrophysics, Leiden Observatory
P36 A QCL-based sensor for exhaled NO analysisJulian Mandon • Molecular and Laser Physics, IMM Radboud University Nijmegen
P37 Nitric oxide detection based on Off-Axis integrated cavity output spectroscopyD. Marchenko • Molecular and Laser Physics, IMM Radboud University Nijmegen
P38 Absolute density-profile measurement of molecular beam by using multiphoton ionization of Xe.Congsen Meng • VU University Amsterdam
P39 Programmable pulse sequences for XUV frequency comb spectroscopy at kHz-level accuracyJ. Morgenweg • VU University Amsterdam
P40 Atom-light interactions in photonic nanostructuresB.O. Mussmann • Debye Institute for NanoMaterials Science,Utrecht University
P41 High precision UV measurements in CO, towards a laboratory test of the time-invariance of µAdrian J. de Nijs • VU University Amsterdam
P42 Coherent soft-X-ray microscopy using few-cycle laser pulsesDaniel Noom • VU University Amsterdam
P43 Atomic parity violation: Ra+
M.Nuñez Portela • KVI Atomic Physics, University of GroningenP44 Single-shot femtosecond electron diffraction
P.L.E.M. Pasmans • Eindhoven University of Technology
8
Poster ProgramP45 Towards ultra-stable frequency combs from NIR to XUV wavelengths
T.J. Pinkert • VU University AmsterdamP46 Velocity map imaging of a slow beam of ammonia molecules inside a linear quadrupole
Marina Quintero Pérez • VU University AmsterdamP47 Photoelectron spectroscopy of chiral molecules using pulse shaping and coincidence imaging
N. Bhargava Ram • VU University AmsterdamP48 Fragmentation dynamics of polycyclic aromatic hydrocarbons after keV ion irradiation
G. Reitsma • KVI Atomic Physics, University of GroningenP49 Numerical optimization of broadband CARS
A.C.W. van Rhijn • MESA+ research institute, University of TwenteP50 Nature’s energy source probed by IR spectroscopy: Can ATP act as a fuel in the gas phase?
Anouk M. Rijs • FOM RijnhuizenP51 Spectroscopy of the 1s2s 3S1 – 1s2s 1S0 transition in quantum degenerate helium
R. van Rooij • VU University AmsterdamP52 Extending the frequency coverage of multi-heterodyne spectroscopy
Axel Ruehl • VU University AmsterdamP53 State-to-state differential cross sections for inelastic scattering of ND3 with Ar and He
A.K. Saha • Molecular and Laser Physics, IMM Radboud University NijmegenP54 Real-time analysis of sulphur containing volatiles emitted from larvae-infested Brassica plants
using Proton Transfer Reaction Mass spectrometryDevasena Samudrala • Molecular and Laser Physics, IMM Radboud University Nijmegen
P55 Digital holographic imaging of latent fingerprintsR.J.T. Scheers • Mesa+ Institute for Nanotechnology, University of Twente
P56 Fourier Microscopy of single plasmonic and metamaterial nanoscatterersIvana Sersic • FOM Institute AMOLF
P57 Polarization-dependent ponderomotive gradient force in a standing waveP.W. Smorenburg • Eindhoven University of Technology
P58 Ionization and fragmentation of free oligonucleotides by kev ions and soft x-ray photonsM. Tiemens • KVI Atomic Physics, University of Groningen
P59 Design of a high quality radially polarized light at 405 nm using thin metal film circular grating.K. Ushakova • Delft University of Technology
P60 The electronic spectra of Bent carbon chains - ‘Particle-in-a-box’ behavior D. Zhao • VU University Amsterdam
P61 Quantum optics with semiconductor spin ensemblesA.R. Onur • KVI Atomic Physics, University of Groningen
9
I1 O1
Bose-Einstein condensation of light
Martin Weitz
Institut für Angewandte Physik,
Universität Bonn, Wegelerstr. 8, D-53115 Bonn
Bose-Einstein condensation, the macro-
scopic ground state accumulation of
particles with integer spin (bosons) at
low temperature and high density, has
been observed in several physical systems,
including cold atomic gases and solid
state physics quasiparticles. However,
the most omnipresent Bose gas, black-
body radiation (radiation in thermal
equilibrium with the cavity walls) does
not show this phase transition. The
photon number is not conserved when
the temperature of the photon gas is
varied (vanishing chemical potential),
and at low temperatures photons
disappear in the cavity walls instead of
occupying the cavity ground state. Here
I will describe an experiment observing a
Bose-Einstein condensation of photons
in a dye-filled optical microcavity. The
cavity mirrors provide both a confining
potential and a non-vanishing effective
photon mass, making the system formal-
ly equivalent to a two-dimensional gas
of trapped, massive bosons. By multiple
scattering of the dye molecules, the
photons thermalize to the temperature of
the dye solution. In my talk, I will begin
with a general introduction and give an
account of current work and future plans
of the Bonn photon gas experiment.
Bose-Einstein condensation in microgravity
W. Lewoczko-Adamczyk • for the
Quantus team
Institut für Physik,
Humboldt-Universität zu Berlin
Van der Waals-Zeeman Instituut,
Universiteit van Amsterdam
We report the preparation and observa-
tion of a Bose-Einstein condensate
during free fall in a 146-meter-tall
evacuated drop tower [1]. During the
expansion over 1 second, the atoms form
a giant coherent matter wave that is
delocalized on a millimeter scale, which
represents a promising source for matter-
wave interferometry to test the universal-
ity of free fall with quantum matter.
We will also present our compact and
portable BEC-apparatus. Special emphasis
will be put on its robustness, which
opens new routes for quantum optics
experiments also in other microgravity
platforms like sounding rockets or space
station.
This work was realized within the
QUANTUS collaboration and is support-
ed by the German Space Agency (DLR)
[1] T. van Zoest et al, Science 328, 1540-1543,
(2010)
Fig. 1 Cuts through the ZARM drop tower facility in
Bremen (A) and the capsule (B) containing the heart
of the BEC experiment (C). Published by AAAS.
10
O2
Spin Drag in a Bose Gas
S.B. Koller, A. Groot, P.C. Bons, R.A. Duine,
H.T.C. Stoof, P. v.d. Straten
Nanophotonics,
Debye institute, Utrecht
Spintronics, a field in solid state physics
where the focus lies on the current of
spin polarized electrons rather than
charge current, is heavily investigated.
An important effect in this field is spin
drag where a spin current of e.g. spin up
electrons drags electrons of spin down
through collisions. Experiments in this
field are limited to fermionic particles
and are often flawed by impurities and
phonons, which lead to ohmic resistance.
Here we present the results of an experi-
ment [1] where we measure spin drag in
an ultra cold atomic Bose gas for the first
time. We perform two different measure-
ments. In the first we exert a force on
one of two spin components and measu-
re the finite drift velocities between
them. In the second we first spatially
separate the two spin components and
then observe the damping of the mutual
oscillation in a trap. The results confirm
the theoretical predictions in the classical
and in quantum regime above the phase
transition to BEC, where this effect is
Bose enhanced [2].
[1] S.B. Koller, A. Groot, P.C. Bons, R.A. Duine,
H.T.C. Stoof, P. v.d Straten Spin drag in a
Bose Gas ArXive
[2] R.A. Duine, H.T.C. Stoof Spin Drag in
Noncondensed Bose Gases, PRL 103 170401
11
O3 O4
Digital quantum simulation with trapped ions
R. Gerritsma, B. Lanyon, C. Hempel, D. Nigg,
M. Müller, F. Zähringer, P. Schindler,
J.T. Barreiro, M. Rambach, G. Kirchmair,
M. Hennrich, P. Zoller, R. Blatt, C.F. Roos
Institut für Quantenoptik und
Quanteninformation, Otto-Hittmair-Platz 1,
A-6020 Innsbruck, Austria.
Simulating quantum physics on a classi-
cal computer becomes impractical for
large systems. A proposed solution [1]
would be to use a quantum simulator:
A well controlled quantum system that
mimics the system to be simulated [2].
Here, we report on the implementation
of digital quantum simulation using
trapped ions [3]. A digital quantum
simulator is a quantum device that can
be programmed to efficiently simulate
any other local system. We use up to
6 ions and up to 100 quantum gates to
reproduce the dynamics of a range of
spin models. We demonstrate the attrac-
tivity of the digital approach by simula-
ting interactions which are beyond those
naturally present in our simulator.
Quantitative bounds for the simulation
quality are obtained.
[1] S. Lloyd, Science 273, 1073 (1996)
[2] I. Buluta and F. Nori, Science 326,
108 (2009)
[3] B. Lanyon et al., Science Express,
1 September 2011
Test of QED in the ground electronicstate rotational sequence of the hydrogen molecule
E.J. Salumbides, G.D. Dickenson, T.I. Ivanov,
W. Ubachs
LaserLaB VU Amsterdam
We have pursued a systematic study of
quantum electrodynamic (QED) effects
in a progression of 16 rotational quan-
tum states in the X 1Σg+, v=0 ground
state of H2 [1]. Accurate calibrations of
the Q(J=6-16) transition energies were
carried out for the EF 1Σg+ - X 1Σg
+ (0,0)
band using two-photon Doppler-free
spectroscopy on rotationally-hot H2 to
obtain 0.005 cm-1 absolute accuracy. In
combination with the accurate values
for EF level energies, the rotational level
energies in the H2 X, v=0 ground state
were derived. Relativistic and QED
corrections are finally obtained from
comparison of the experimentally-
obtained ground state level energies with
the most accurate ab initio nonrelativistic
calculations. The extracted QED and
relativistic contributions to rotational
level energies, which can be as high as
0.13 cm-1, are found to be in perfect
agreement with most recent calculations
of QED and high-order relativistic effects
for the H2 ground state.
[1] E. J. Salumbides et al., Phys. Rev. Lett. 107,
043005 (2011).
12
I2
Scattering lens resolves nanostructure
A.P. Mosk1, E.G. van Putten1, D. Akbulut1,
J. Bertolotti1,2, G. Ctistis1, W.L. Vos1,
and A. Lagendijk1,3
1 Complex Photonic Systems, Faculty of Science
and Technology and MESA+ Institute for
Nanotechnology, University of Twente.
2 University of Florence, Dipartimento di
Fisica.
3 FOM Institute for Atomic and Molecular
Physics (AMOLF)
Scattering of light is usually seen as a
nuisance in microscopy, as it strongly
deteriorates the achievable resolution.
However, by gaining active spatial control
over the optical wave front we have
shown that it is possible to manipulate
the propagation of scattered light far in
the multiple scattering regime. These
wave front shaping techniques have given
rise to new high-resolution microscopy
methods [1,2]. This is based on the
realization that scattering by stationary
particles performs a linear transform-
ation on the incident light modes. By
inverting this linear transformation,
one can focus light through an opaque
material and even inside it, as shown in
Fig. 1. An extremely high resolution
focus can be obtained using scatterers
embedded in a high-index medium. We
have constructed a scattering lens made
of the high-index material Gallium
Phosphide (GaP) which has the highest
index of all nonabsorbing materials in
the visible range. This yields a focal spot
resolution of less than 100 nm, and it
seems theoretically possible to create a
focus of order 70 nm [1]. We will discuss
how the system resolution of a micro-
scope using this lens could be pushed
even higher.
[1] E.G. van Putten, D. Akbulut, J. Bertolotti,
W.L. Vos, A. Lagendijk, and A.P. Mosk,
Scattering Lens Resolves sub-100 nm
Structures with Visible Light, Phys. Rev.
Lett. 106, 193905 (2011).
[2] E.G. van Putten, A. Lagendijk, and A.P. Mosk,
Optimal concentration of light in turbid
materialsJ. Opt. Soc. Am. B 28, 1200 (2011).
Fig. 1: (a) A normal lens has a restricted numerical
aperture (NA), which limits the resolution with which
it can focus light. (b) Scattered light can reach the tar-
get point from any angle, effectively covering full NA.
The incident wave can be structured to force construc-
tive interference at the target.
13
O5 O6
Near-field investigation of localizedmodes in slow-light photonic crystalwaveguides
S.R. Huisman1, G. Ctistis1, J.L. Herek1,
S. Stobbe2, P. Lodahl2, W.L. Vos1,
P.W.H. Pinkse1
1 MESA+ Institute for Nanotechnology,
University of Twente, 2 DTU Fotonik , Denmark
Disorder in photonic-crystal slab wave-
guides can cause localization of light.
To study this phenomenon, a near-field
scanning optical microscope (NSOM)
is the ideal tool, because one can probe
light from any desired point along the
waveguide surface with sub-wavelength
resolution. We observe, decompose, and
analyze intricate mode structures in
GaAs photonic waveguides using a phase-
sensitive NSOM in the near IR. At the
band-edge for TE-like guided modes,
i.e. in the slow-light regime, narrowband
localized modes are observed for certain
frequencies, where the light is strongly
confined at random locations along
the waveguides. At these localized modes
light also extends out from the waveguide
axis.
Figure caption: NSOM image of the light in a
photonic-crystal waveguide
Signature of electromagnetically induced transparency in a plasmonicmolecule’s local density of optical states
[1] O. O. Versolato et al. Phys. Lett. A 375 (2011)
3130-3133
[2] G. S. Giri et al. Phys. Rev. A 84 (2011)
020503(R)
Single-shot femtosecond electron diffraction
P.L.E.M. Pasmans, S.F.P. Dal Conte,
T. van Oudheusden, O.J. Luiten
Eindhoven University of Technology
Ultrafast electron diffraction (UED)
enables the study of the dynamics of
non-equilibrium structures, like phase
transitions and conformation changes,
with both spatial and temporal resolution
at the atomic level (~0.1 nm and ~100
fs). To acquire a diffraction pattern of
sufficient quality, typically 106 electrons
are required. So far in UED experiments,
multiple shots are used to build up a
high-quality diffraction pattern, limiting
the applicability of UED to reversible
processes. Single-shot operation requires
packing ~106 electrons in a single bunch.
Unfortunately, the strong repelling
Coulomb forces inevitably broaden the
bunch.
In our setup, we accelerate electron
bunches to 100 keV and reverse the
bunch expansion by injection onto the
oscillatory field sustained in a radio-
frequency (RF) cavity. In this way, we
have realized sub-100 fs, 100 fC, 100 keV
electron bunches, which thus fulfill all
requirements for single-shot femtosecond
electron diffraction. Using only a single
electron bunch, we have demonstrated
single-shot diffraction on a variety of
thin films.
Currently, we are optimizing our setup
and we are performing our first pump-
probe time-resolved UED experiments.
47
P45 P46
Towards ultra-stable frequency combsfrom NIR to XUV wavelengths
T. J. Pinkert, I. Barmes, J. Morgenweg,
A. Ruehl, and K. S. E. Eikema
LaserLaB, VU University Amsterdam
At LaserLaB, we recently demonstrated
high-precision frequency comb metrolo-
gy, ranging from kHz-level measurements
in the near-infrared (NIR) [1] to record
high accuracy at the MHz-level in the
extreme ultraviolet (XUV) [2].
Considerable improvements are feasible if
the optical linewidths of the employed
frequency combs can be reduced from the
current values of about 1 MHz. For this
purpose, an ultra-stable CW laser system
at ~1550 nm with an estimated linewidth
of about 1 Hz is currently under develop-
ment. It will serve as a new optical
reference, and will also be used for
dissemination of reference frequencies
through fiber-networks. The system based
on a diode laser locked to a high-finesse
cavity further includes amplification,
frequency conversion and distribution
stages to simultaneously cover the
wavelengths of our fiber (Er,Yb) and
Ti:sapphire frequency combs. We expect
to reduce their optical linewidths by
several orders of magnitude.
[1] R. van Rooij et al., Science 333, 196 (2011)
[2] D.Z.Kandula et al., PRL 105, 063001 (2010
Towards ultra-stable frequency combsfrom NIR to XUV wavelengths
T. J. Pinkert, I. Barmes, J. Morgenweg,
A. Ruehl, and K. S. E. Eikema
LaserLaB, VU University Amsterdam
At LaserLaB, we recently demonstrated
high-precision frequency comb metrolo-
gy, ranging from kHz-level measurements
in the near-infrared (NIR) [1] to record
high accuracy at the MHz-level in the
extreme ultraviolet (XUV) [2].
Considerable improvements are feasible if
the optical linewidths of the employed
frequency combs can be reduced from the
current values of about 1 MHz. For this
purpose, an ultra-stable CW laser system
at ~1550 nm with an estimated linewidth
of about 1 Hz is currently under develop-
ment. It will serve as a new optical
reference, and will also be used for
dissemination of reference frequencies
through fiber-networks. The system based
on a diode laser locked to a high-finesse
cavity further includes amplification,
frequency conversion and distribution
stages to simultaneously cover the
wavelengths of our fiber (Er,Yb) and
Ti:sapphire frequency combs. We expect
to reduce their optical linewidths by
several orders of magnitude.
[1] R. van Rooij et al., Science 333, 196 (2011)
[2] D.Z.Kandula et al., PRL 105, 063001 (2010
48
P47 P48
Photoelectron spectroscopy of chiralmolecules using pulse shaping and coincidence imaging
N. Bhargava Ram, C.S. Lehmann
and M.H.M. Janssen
LaserLaB and Physical Chemistry,
VU University Amsterdam
Chiral molecules are a special class of
molecules that come in two versions –
left and right handed form. Many amino
acids and pharmaceutical drugs are
chiral. Existing techniques to distinguish
and characterize chirality are based on
‘circular dichroism’, where the difference
in the absorption coefficient of the chiral
sample for the left and right circularly
polarized light is measured. This differ-
ence is typically 0.01 %. It was predicted
in the 1970’s that one-photon ionization
of chiral enantiomers using left and right
circularly polarized light would yield a
strong forward-backward asymmetry in
the photoelectron angular distribution.
Photoelectron circular dichroism in many
chiral molecules was measured using
synchrotron sources in the last few years
revealing asymmetries to the tune of
20 %.
To explore whether the chirality effects
from one-photon ionization can be furt-
her enhanced with respect to sensitivity
and selectivity by ultrafast multiphoton
excitation, we have initiated photoioniza-
tion experiments on chiral molecules
using femtosecond lasers with pulse
shaping capability and the powerful
coincidence imaging technique. Details
of recent work on this front will be
presented.
Fragmentation dynamics of polycyclicaromatic hydrocarbons after keV ionirradiation
G. Reitsma1, R. Hoekstra1, T. Schlathölter1,
R. Brédy2, L. Chen2, J. Bernard2, S. Martin2
1 KVI Atomic Physics, University of Groningen2 LASIM
The IR emission features of the interstel-
lar medium are generally attributed to
fluorescence emission of Polycyclic
Aromatic Hydrocarbons (PAHs). The
abundance of these PAHs significantly
influences the evolution of interstellar
gas and hence their origin and evolution
is a key question in astrophysics. After
a pioneering study on ion-PAH inter-
actions, at the KVI we have recently
built a setup in which we can study the
reaction dynamics of PAHs under ener-
getic ion irradiation. A supersonic jet is
seeded with PAHs and crossed with a
beam of highly charged ions in a recoil
ion momentum spectrometer. With this
apparatus, the 3D vector of the different
reaction products can be obtained. We
will present the first promising results
for ion collisions on anthracene.
The system does not allow us to deter-
mine the energy which is deposited into
the molecule before fragmentation. To
obtain this complementary information
we performed the CIDEC method on
anthracene-proton collisions at LASIM
université Lyon. An almost complete
picture of fragmentation channels and
corresponding excitation energy distribu-
tions was obtained and will be presented.
49
P49 P50
Numerical optimization of broadband CARS
A.C.W. van Rhijn, A. Jafarpour, M. Jurna,
J.L. Herek, and H.L. Offerhaus
Optical Sciences group, MESA+ research
institute, University of Twente
We explore the customization of (ultra-
short) light pulses for the detection and
imaging of specific chemical compounds.
Specifically we look at optimal phase
shaping strategies for a Coherent
AntiStokes Raman Scattering (CARS)
microscope that uses (degenerate)
broadband pump and probe pulses and
a narrowband Stokes pulse. By pre-
optimizing the spectral phase ϕ(λ) of the
broadband pulses with an evolutionary
algorithm, we find pulse shapes that can
selectively excite a compound of interest
in a mixture of resonant components,
where the predicted contrast ratios vary
from 100:1 up to 2200:1. Furthermore
we investigate the effects of noise in
the optimization and the effect of mixing
of the CARS signals within the focal
volume.
Figure caption: Selective excitation based on spectral
phase shaping.
Nature’s energy source probed by IR spectroscopy:Can ATP act as a fuel in the gas phase?
Anouk M. Rijs2, Jeffrey D. Steill1,
and Giel Berden2
1 Combustion Research Facility,
Sandia-California
2 FOM Institute for Plasma Physics Rijnhuizen
The main energy source that powers
many processes in mammalian cells is
adenosine 5’-triphosphate (ATP). ATP is
mainly used to fuel biomolecular motors,
which are, for example, involved in
muscle contraction, and active cargo
transport between cells. To perform their
function, these biomolecular motors
convert ATP into directed mechanical
motion. This biomolecular motion is
initiated by conformational changes at
the active site of these motorproteins,
and is induced by the association and
subsequent hydrolysis of ATP into ADP.
To fully understand the biological energy
production (hydrolysis of ATP to ADP),
both the photodissociation pathways as
well as detailed structural information of
ATP and its dephosphorylation products
ADP, AMP and cAMP have been obtained
by performing IR multiple-photodissocia-
tion (IRMPD) spectroscopy. In this
contribution we will elaborate on two
important issues; (i) does gas phase
dissociation follow the by nature selected
biochemical pathway and (ii) does the
favorable ATP structure which associates
to the hydrophobic active site coincides
with the isolated structures.
50
P51 P52
Spectroscopy of the 1s2s 3S1 – 1s2s 1S0
transition in quantum degenerate helium
R. van Rooij1, J.S. Borbely1, J. Simonet1,2,
M.D. Hoogerland1,3, K.S.E. Eikema1,
R.A. Rozendaal1, W. Vassen1
1 LaserLaB, VU University Amsterdam2 ENS, Paris3 University of Auckland
We have measured the extremely weak
IR transition between the two metastable
states in helium [1] to a precision of 8
parts in 1012, three orders of magnitude
more precise than state-of-the-art QED
calculations provide. Trapping the atoms
in an optical dipole potential at ultralow
temperatures allows for the long inter-
action times (up to 6 seconds) required
to excite this transition. A 1.5 micron
fiber laser, referenced to a frequency
comb, provides both the excitation beam
as well as the optical dipole trap.
Transition frequencies for 3He and 4He
were measured at the kHz level. Our
results agree with present-day QED theo-
ry of the absolute ionization energies of
the metastable states, which is accurate
to the MHz level, and poses a significant
challenge for theorists to calculate
higher-order terms. Through the isotope
shift the 3He nuclear charge radius was
deduced to be 1.961(4)fm.
[1] R. van Rooij et al., Science 333, 196 (2011).
Extending the frequency coverage ofmulti-heterodyne spectroscopy
Axel Ruehl1, Marco Marangoni2,
and Kjeld S. E. Eikema1
1 LaserLaB, VU University Amsterdam,
The Netherlands2 Politechnico di Milano, Italy
Multi-heterodyne spectroscopy with a
pair of detuned frequency combs allows
simultaneous measurement of absorption
and phase shift experienced by thousands
of comb lines [1]. So far, measurements
were only done at the laser wavelengths
limiting its versatility. Here, we propose
experiments to overcome this major
obstacle. The basis of our set-up are two
low-noise fiber frequency combs with
subsequent generation of highly coherent
tunable Raman solitons [2]. With these
tunable sources, the accessible spectral
range already spans from 1.1 to 1.8 µm.
In particular, when shifted to 1.5 µm and
further amplified, we observed up to 150
µW per comb mode which is sufficient
to perform saturation spectroscopy at the
P(5) to P(20) rovibrational transitions of13C2H2. Frequency conversion to the
molecular fingerprint region can be car-
ried out by difference frequency genera-
tion in Gallium Selenide crystals.
Numerical simulations predict mW-level
offset-free frequency combs covering
3 – 11 µm.
[1] Coddington et al., PRL 100, 013902 (2008)
[2] Ruehl et al., PRA 84, 011806 (2011)
51
P53 P54
State-to-state differential cross sectionsfor inelastic scattering of ND3 with Ar and He
A.K. Saha, C.K. Bishwakarma,
S.Y.T. van de Meerakker, A.T.J.B. Eppink
and D.H. Parker
Molecular and Laser Physics,
IMM Radboud University Nijmegen
The pumping mechanism of the ammo-
nia molecule in the interstellar medium
can be attributed to radiative and colli-
sional excitation. Astrophysical models
of these environments heavily rely on
theoretical calculations of collision cross
sections that depend themselves on the
accuracy of the potential energy surface.
Experimental measurement of differential
cross sections (DCS) is the best tool to
check the accuracy of the interaction
potential between molecules. In this
experiment the initial single rotational
state has been prepared using a hexapole
state selector. We measured state-to-state
inelastic DCSs of the ND3 molecule
colliding with Argon and He in a crossed
molecular beam experiment, using the
velocity map imaging (VMI) technique.
Rotational excitation of ND3 molecules
due to collisions with Argon and He is
probed by (2+1) resonance enhanced
multi-photon ionization spectroscopy.
Devasena Samudrala1, Elena Crespo1,
Simona M. Cristescu1, Nicole M. Van Dam2,
Frans J.M. Harren1
1 Life Science Trace Gas Facility
IMM Radboud University Nijmegen2 Ecogenomics, Radboud University Nijmegen
Proton Transfer Reaction Mass spectro-
metry (PTR-MS) has emerged as a useful
tool by allowing rapid, on-line detection
of trace gases from various chemical
groups with detection in the order of
seconds and detection sensitivity at the
(sub) parts per billion volume level.
PTR-MS is a soft ionization technique
and ionizes very efficiently larger volatile
organic compounds (VOCs) in air. The
method is used to detect on-line VOCs
emitted from roots of Brassicaecae plants
under attack of cabbage root fly larvae.
Several sulphur containing compounds
and glucosinolate breakdown products,
thiocyanates and isothiocyanates were
emitted by roots in response to infesta-
tion. The most typical marker for rapid
responses were mass 60 and m49, which
were identified as thiocyanicacid and
methanethiol. The identification and
dynamic patterns of the responses may
help to design non-invasive analytical
procedures to asses root infestations.
Real-time analysis of sulphur containing volatiles
emitted from larvae-infested Brassica plants using
Proton Transfer Reaction Mass spectrometry
52
P55 P56
Digital holographic imaging of latentfingerprints
R.J.T. Scheers, M. Bayraktar, C.J. Lee,
P.J.M. van der Slot, K.J. Boller
Laser Physics and Nonlinear Optics,
Mesa+ Institute for Nanotechnology,
University of Twente
Fingerprints patterns are used as impor-
tant evidence in forensic investigations.
Traditional acquisition methods that
unambiguously retrieve the fingerprint
pattern destroy or contaminate other
trace evidence concealed within the
fingerprint residue.
Here, we demonstrate proof-of-principle
digital holographic imaging of latent
fingerprints, which provides a non-
destructive and in-situ image of latent
fingerprints. We digitally recorded holo-
grams of fingerprint patterns in an
off-axis Michelson interferometer in
reflection geometry. The images of the
fingerprints were reconstructed numeri-
cally using the discrete Fresnel transfor-
mation (see reconstructed example
below). Further investigations, such as
the effect of absorption of laser light by
fingerprint residue on the contrast of the
reconstructed images, will be reported.
Fourier Microscopy of single plasmonicand metamaterial nanoscatterers
Ivana Sersic, Christelle Tuambilangana
and Femius Koenderink
FOM Institute AMOLF
Plasmonic and metamaterials nano-
scatterers are excellently suited building
blocks for realizing sub-wavelength
optical components, such as antennas
that convert near-field to far-field light.
The angular distribution of scattered light
is essential for operation of such anten-
nas. While cross-sections of these nano-
scatterers exceed their geometrical area,
small absolute cross-sections make
measuring the angular distribution of
scattering from single objects a challenge.
We report an experimental technique for
quantifying the angular distribution of
light scattered by any single nanoscatterer.
Our dark-field microscope consists of a
supercontinuum white light laser coupled
to an acousto-optical filter for wave-
length selection. The sample is excited by
means of total internal reflection and the
angular distribution of scattered light is
retrieved from microscope back-aperture
imaging. We report on a variety of
plasmonic and metamaterial structures,
including spit ring resonators (SRR), that
are expected to have interesting radiation
patterns due to the existence of mutually
cross-coupled magneto-electric polariz-
abilities.
53
P57 P58
Polarization-dependent ponderomotivegradient force in a standing wave
P. W. Smorenburg, J. H. M. Kanters,
A. Lassise, G. J. H. Brussaard, L. P. J. Kamp,
and O. J. Luiten
Applied Physics, Coherence and Quantum
Technology, Eindhoven University of
Technology
The ponderomotive force is derived for
a relativistic charged particle entering
an electromagnetic standing wave with a
general three-dimensional field distribu-
tion and a nonrelativistic intensity, using
a perturbation expansion method. It is
shown that the well-known pondero-
motive gradient force expression does
not hold for this situation. The modified
expression is still of simple gradient form,
but contains additional polarization-
dependent terms. These terms arise
because the relativistic translational
velocity induces a quiver motion in the
direction of the magnetic force, which is
the direction of large field gradients.
Oscillation of the Lorentz factor effecti-
vely doubles this magnetic contribution.
The derived ponderomotive force genera-
lizes the polarization-dependent electron
motion in a standing wave obtained
earlier. Comparison with simulations in
the case of a realistic, non-idealized,
three-dimensional field configuration
confirms the general validity of the
analytical results. For details, see
Smorenburg et al., Phys. Rev. A 83, 063810
(2011).
Ionization and fragmentation of free oligonucleotides by kev ions andsoft x-ray photons
M. Tiemens1, O. Gonzalez-Magaña1,
G. Reitsma1, M. Door1, S. Bari2, R. Hoekstra1,
R. Wagner3, M. Huels3, T. Schlathölter1
1 KVI University of Groningen2 Max Planck Advanced Study Group, CFEL,
Germany3 Department of Nuclear Medicine and
Radiobiology, University of Sherbrooke,
Canada
To study the direct effect of biological
radiation damage, the ionization and
fragmentation dynamics of isolated gas
phase DNA building blocks by energetic
photons and keV ions has been exten-
sively investigated. For the first time, we
performed a comparative study on the
fragmentation of more complex free
doubly protonated oligonucleotides
GCAT and GTAT upon ionization by keV
ions and soft X-ray photons. No influ-
ence of the location of the ionization
site on fragmentation is observed. The
molecules almost completely disintegrate,
with PO3H2+ and protonated nucleobases
dominating the fragmentation spectra;
the latter suggests intra-molecular hydro-
gen abstraction during the glycosidic
bond cleavage.
54
P59 P60
Design of a high quality radially polarized light at 405 nm using thinmetal film circular grating
K. Ushakova, S.F. Pereira, H.P. Urbach
Optics Research Group,
Delft University of Technology
On the last decade, radially polarized
light possessing high degree of circular
symmetry and purity has attracted in-
tense attention due to applications in
tight focusing, material processing and
optical tweezers. We show the design of a
high quality radial polarization formation
for wavelength of 405 nm by means of a
thin metal film diaphragm compound
of sub wavelength concentric nanoslit
grooves. A three-stage optimization of
the diaphragm geometry characteristic
parameters (film thickness, pitch of
grooves) and materials is carried out.
For this purpose we utilize the models
of metal-insulator-metal waveguide,
1D grating followed by a 3-D grating
configuration. Analysis of the mentioned
models reveals details of the filtering
capability of the radial polarization, i.e.,
transmission suppressing of TE and
supporting of TM modes correspondingly.
The electronic spectra of Bent carbon chains - ‘Particle-in-a-box’behavior
D. Zhao1, M. A. Haddad1, H. Linnartz,2,1
W. Ubachs1
1 VU University Amsterdam2 University of Leiden
Highly unsaturated hydrocarbon chain
species, both linear and nonlinear, play
an important role as precursors in the
formation of PAHs and fullerenes.
Electronic absorption spectra of three
non-linear carbon-chain radicals,
HC4CHC4H, HC4CHC6H, and
HC4C(C2H)C4H, have been recorded by
cavity ring-down spectroscopy through
an expanding hydrocarbon plasma. Their
molecular structures are unambiguously
determined from the electronic spectra
combined with deuterium labeling in
the gas phase. By comparing the results
to those of previously reported linear
chains, the general applicability of the
‘particle-in-a-box’ model and the poten-
tial of deuterium labeling in optical s
pectroscopic studies of bent carbon-chain
systems is discussed. This insight may
assist the characterization of electronic
transitions of other non-linear carbon
chains in future.
55
P61
Quantum optics with semiconductorspin ensembles
A.R. Onur1, A.U. Chaubal1, M. Sladkov1,
M.P. Bakker1, J. Sloot1, D. Reuter2, A. Wieck2,
C.H. van der Wal1
1 Zernike Institute for Advanced Materials,
University of Groningen,The Netherlands
2 Angewandte Festkörperphysik,
Ruhr-Universität Bochum, Germany
We present quantum optical studies with
ensembles of donor-bound electron
spins in ultra-pure GaAs materials with
Si doping at very low concentrations
(1013-1014 cm-3). These donor-bound
electrons (D0 systems) provide unique
system properties for solid state quantum
information processing, since they
combine a high level of ensemble homo-
geneity (as for atomic vapors) with
strong optical transitions and the ability
to nano-fabricate and integrate very
compact optoelectronic devices with
semiconductor processing tools.
Specifically, we report the observation
of dynamic nuclear polarization in
this material [1], using electromagneti-
cally induced transparency as a driving
mechanism and as a probe for the
effective magnetic, Overhauser, field.
[1] M. Sladkov et al., Phys. Rev. B 82, 121308
(2010).
56
Workgroups
AMSTERDAM (AMOLF)prof.dr. H.J. Bakker Ultrafast Spectroscopyprof.dr. L. Kuipers Nano-opticsprof.dr. A. Lagendijk Photon Scatteringprof.dr. A. Polman Photonic Materialsdr. J. Gómez Rivas* Nanowire Photonicsdr. F. Koenderink Resonant Nanophotonicsdr. G. Koenderink Soft Matter Imaging* High Tech Campus Eindhoven
AMSTERDAM (Universiteit van Amsterdam)prof.dr. T. Gregorkiewicz Opto-electronics Materialsdr. R.Sprik Soft matter physics waves in complex mediadr. N.J. van Druten Quantum Gases, Atom Optics, Quantum Informationdr. T.W. Hijmansprof.dr. H.B. van Linden van den Heuvellprof.dr. G.V. Shlyapnikovdr. R.J.C. Spreeuwprof. dr. J.T.M. Walraven
AMSTERDAM (Vrije Universiteit)prof.dr. W. Ubachs Frequency metrology and variation of fundamental Constants,dr. W. Vassen laser cooling and Bose-Einstein prof.dr. K.S.E. Eikema Condensation, high-intensity ultrafast lasers and dr. H.L. Bethlem x-Ray generation, spectroscopy of small molecules dr. S. Knoop (of atmospheric and astrophysical interest), dr. J.C.J. Koelemeij XUV Laser spectroscopyprof. dr. M.H.M. Janssen Ultrafast molecular photodynamics, photoelectron-Photoion
coincidence imaging, quantum state-to-State imaging of oriented molecules, quantum control and pulse shaping
prof.dr. J.F. de Boer Optical Coherence Tomography, spectroscopy
DELFT (Technische Universiteit)prof. dr.ir. J.J.M. Braat dr. A.J. L. Adamprof. Dr. P.C.M. Plankendr. S.F. Pereiradr. F. Bociortdr. N. Bhattacharyadr.ir. R. Hanson
Terahertz imaging & spectroscopy
Optical recording, near and far field microscopyOptical design, lithography
Optical aperture synthesisQuantum science in the solid state, quantum information, diamond defect centers
57
Workgroups
EINDHOVEN (Technische Universiteit)dr. ir. G.J.H. Brussaarddr. ir. S.J.J.M.F. Kokkelmansprof. dr. K.A.H. van Leeuwenprof. dr. ir. O.J. Luitendr. ir. P.H.A. Mutsaersdr. ir. E.J.D. Vredenbregt
ENSCHEDE (Universiteit Twente)prof. dr. K.J. Bollerdr. F.A. van Goordr. H. M. J. Bastiaensdr. P.J.M. van der Slot
Prof.dr. J.L. HerekDr. H.L. Offerhaus
prof. dr. V. Subramaniamdr. M.L Bennink prof.dr. Carl Figdor dr. H. Kanger dr. R. Kooyman dr. I. Segers-Nolten dr. W. Steenbergenprof. dr. A.J.G.M. (Ton) van Leeuwen dr. S. Manoharprof. dr. L.W.M.M. Terstappendr. C. Otto dr. R. Schasfoortprof. dr. W.L. Vosdr. A.P. MoskPepijn Pinkseprof. dr. M Pollnaudr. S. Garcia Blancodr. M. Hammerdr. H. Hoekstradr. R. De Ridderdr. K. Worhoff
Ultra cold plasma’s, Rydberg atoms, bright ion and electronbeams, atom optics, nanostructures by atom lithography,Compact (laser-driven) electron accelerators; generation of collective radiation (THz to XUV), including FEL physics;femtosecond-pulse physics, cold atomic interactions, quantum gases
Laserphysics and nonlinear optics, solid state. Parametricoscillators, laser wakefield acceleration. Nonlinear pulse propagation in photonic crystals. Frozen light, mid-IR molecular detection, high power diode lasers, laser materialprocessing.Biomolecular control, field shaping, coherent control,nonlinear/vibrational.Spectroscopy/microscopy, nanophotonics,plasmonic structures, near-field probe microscopy.Nano biophysics, genomic, proteomics, spectroscopy.
Biomedical photonic imaging, tissue imaging acoustic imaging and OCT.Medical cell biophysics, nonlinear spectroscopy and microscopy. Raman imaging Microfluidics.
GRONINGEN (Kernfysisch Versneller Instituut)prof. dr. ir. R. Hoekstradr. T. Schlathölter
prof. dr. K. Jungmannprof. dr. H. Wilschutdr. L. Willmanndr. G. Onderwater
GRONINGEN (Rijksuniversiteit Groningen)prof. dr. ir. P.H.M. van Loosdrechtdr. M.S. Pchenichnikovprof. dr. J.Koesterdr. T. L.C. Jansendr. V.A. Malyshevdr. W.R. Browndr. G. Palasantzasprof. dr. B. Poolmanprof. dr. A. van Oijen prof. dr. ir. C.H. van der Walprof. dr. J.C. Hummelenprof. dr. M. A. Loi
LEIDEN (Universiteit Leiden)prof.dr. D. Bouwmeesterdr. M.J.A. de Dooddr. E.R. Elieldr. M.P. van Exterprof. G.W. 't Hooftprof. dr. J.P. Woerdmanprof. dr. G. Nienhuis (theory)prof. dr. E.J.J. Groenenprof. dr. S.L. Völkerprof. dr. M. Orritdr. P. Gastdr. M.I. Huberprof. dr. C.W.J. Beenakker (theory)prof. dr. G.J. Kroesdr. H.V.J. Linnartz
58
Radiation damage in biomolecular systems. Highly-charged ion physics, reaction microscopy, laser coolingand trapping, atomic processes at surfaces. Development of aX ray free electron laser ZFEL.Production of short-lived ions and atoms, ion/atom. Trapping, alkali/alkali earth trapping, atomic Spectroscopy,fundamental interactions, search for electric dipole moments.
Optical Condensed Matter Physics.Multidimensional femtosecond optical spectroscopy.Theory of Condensed Matter.
Molecular Systems and InterfacesNanoscale surface physics and Casimir forcesMembrane EnzymologySingle-Molecule Biophysics.Physics of Quantum Devices.Organic photovoltaicsPhotophysics and OptoElectronics Organic Semiconductor
NIEUWEGEIN (FOM Instituut voor Plasmafysica RIJNHUIZEN)dr. A.F.G. van der Meerdr. G. Berdendr. B. Redlichprof.dr. J. Oomensdr. J.M. Bakkerdr. A.M. Rijs
NIJMEGEN (Radboud Universiteit Nijmegen)prof. dr. D.H. Parkerdr. F.J.M. Harren
dr. S.Y.T. van de Meerakkerprof. dr. Th. Rasing
dr.ir. G.C. Groenenboomdr. H.M. Cuppendr. K. Gubbels prof. dr.ir. A. van der Avoird (theory)prof. dr. W.J. van der Zandeprof. dr. W.L. Meertsdr. R.T. Jongma
UTRECHT (Universiteit Utrecht)prof. dr. P. van der Stratendr. ir. J.M. Vogelsdr. D. van Oostenprof.dr.ir. H.T.C. Stoof
dr. R.A. Duine
FEL physics, generation and application of infrared/THz radiation.
Molecular physics. infrared ion spectroscopy and structure,conformation selective spectroscopy, mass spectrometry, biomolecules, metal clusters, astrochemistry.
Laser physics, molecular photodissociation, atmosheric processes, trace gas detection, medical and biological applications.Cold and controlled collisionsNonlinear optics, time-resolved laser spectroscopy, light scattering, magnetic, polymeric and liquid crystallinematerials, atom lithography.Molecular interactions and light-induced processes.Mobility in solid molecular materials
Biomolecular structure, Molecular and atmospheric Physics,THz generation, detection and applications to biomoleculesand bio-mimetics, Free Electron Laser.
Laser manipulation of atoms, Bose-Einstein condensation,Atom optics.Cold atom nanophotonics.Dynamics of Bose-Einstein Condensates, Quantum Effects inDegenerate Fermion and/or Boson gases.Spintronics.