Tips for preparing research proposal and some advises
Tips for preparing research proposal and some advises
Wen-Feng Hsieh
Department of Photonics &Institute of Electro-Optical
EngineeringNational Chiao Tung University2008/10/18
NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics Lab in 2008/10/11 2008/10/12NCTUWen-Feng
Hsieh
DoPIEOLaser Diagnostics LabIt is only my opinion! Use advises at
your own risk! Reviewers may not agree!NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabOutlineHow to prepare an effective
proposal Whitesides Group: Writing a paper, Adv. Mater. (2004)What
is in Some advisesNCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics Lab:(50%) () NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics Lab(50%)121234(NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabHow to prepare an effective proposal
Whitesides Group: Writing a paperGeorge M. Whitesides, Adv. Mater.
16(15), 1375 (2004)NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabWhat is a Scientific Paper?A paper is
an organized description of hypothesis, data and conclusions,
intended to instruct the reader.Papers are a central part of
research. A paper is also a structure for planning your research in
progress.A good outline for the paper is also a good plan for the
research program.
NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabWhy writing a paperIf your research
does not generate papers, it might just as well have not been
done.
Interesting and unpublished is equivalent to non-existent.
NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabHow to write a paperWriting a paper
starts from organizing the outline It is most efficient to write
papers from outlines.An outline is a written plan of the
organization of a paper.All writing that I do papers, reports,
proposals, and slides for seminars I do from outlines.A good
outline will organize the various topics and arguments in logical
form.
NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabWhats in a paperTitle,
authorsAbstractIntroductionSignificance of this workProblem
descriptionGoalsSolution & ConclusionMethodResults and
DiscussionConclusions/Future WorksReferences
Noun -- the most important conclusion -- the central message
Three (or several) central pointsMotivationNCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabWhat is in Executive summary
Significance of this workProblem descriptionGoalsProposed
Solution Anticipated resultsCapital funding
requestMotivationWithout references1It is plenty!NCTUWen-Feng
Hsieh
DoPIEOLaser Diagnostics Lab1.2.3.4.5.1.2.3.4.
NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics Lab ()
NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics Lab-- Introduction --Significance of
this work --Problem description -- Goals --Proposed Solution
(Capital funding request)21NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics Lab1.2.3.1
* Remember to describe the reasons why you need the proposed
capital equipments and budget here if any.NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics Lab
(your commitments) NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabSome advisesKnow what you can handle
well to build up good reputation.Open mind to enthusiastically
share your results and techniques to colleague Publish papers
whatever things have been done. Interesting and unpublished is
equivalent to non-existent.Think deeply to make things simple and
useful or significant --
NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabSize dependent RRS Only enhancing LO
modes but not TO modes implies the Frhlich interaction dominates
the exciton-phonon coupling, which can be characterized by
I2LO/I1LO.Decreasing electron-phonon coupling as decreasing
particle sizes that agrees well with the results of PRB 69, 113303
(2004) for nanowires.
APPL. PHYS. LETT. 88, 261909 (2006)NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabReducing exciton-longitudinal-optical
phonon interaction with shrinking ZnO quantum dots LO-phonon
replicas for:ZnO powders obviousQD-samples unapparent
13 KThe energy shift from 3.377 eV to 3.475 eV is due to quantum
confinement effect (QCE)
The intensities of LO-phonon replicas depend strongly on their
exciton-phonon coupling strengthsDuke et al., Phys. Rev. 139, 1965
(1965)Hsu WT, et al., APL 91(18), 181913 (2007) NCTUWen-Feng
Hsieh
DoPIEOLaser Diagnostics LabZnO quantum dots system
Temperature-dependent PL
7.4 nm25 meVOnly one main band exists around all
temperaturesBinding energy of D0X is smallIt will be ionized until
T > 100K
The only band is FX emissionThe energy difference (13~300K) :QDs
(25 meV) < Powders (62 meV)The main contribution to the energy
shift is the Frhlich interactionNCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabPower dependent PL of ZnO QDs
NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabAcoustic and optical phonon assisted
formation of biexcitons
Power dependent PLBxFx
10K80KDispersion of exciton-polariton Lower Te for than for More
excitons populate in @ 80K than @ 10K
P2Pn=1n=2n=Eexcitonwave vector kUPBLPBenergyEg15meVAppl. Phys.
Lett. 91, 111907 (2007)NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabSome advisesKnow what you can handle
well to build up good reputation.Open mind to enthusiastically
share your results and techniques to colleague especially senior
researchersPublish papers whatever things have been done.
Interesting and unpublished is equivalent to non-existent.Think
deeply to make things simple and useful or significant
NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabIt is only my opinion! Use advises at
your own risk! Reviewers may not agree!NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics Lab25Thanks for your
attentionNCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabIntegrated emission intensity of
biexciton vs. pumping
Iexc0.32 0.53 1.86 80K40K10K Power exponent for biexciton should
be close to 2. Observe anomalous temperature dependent power
exponents NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabAcoustic and optical phonon assisted
formation of biexcitons
Power dependent PLBxFx
10K80KDispersion of exciton-polariton Lower Te for than for More
excitons populate in @ 80K than @ 10K
P2Pn=1n=2n=Eexcitonwave vector kUPBLPBenergyEg15meVAppl. Phys.
Lett. 91, 111907 (2007)NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabTemperature dependent biexciton
formation At low T, the relaxation process involves only emission
of acoustic phonons to lower kinetic energy. At high T, optical
phonons participate in to efficiently lower exciton kinetic energy,
since Te ~ .
Iexc0.32 0.53 1.86 80K40K10KP2Pn=1n=2n=Eexcitonwave vector
kUPBLPBenergyEgNCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabZnO quantum dots system
Temperature-dependent PL
7.4 nm25 meVOnly one main band exists around all
temperaturesBinding energy of D0X is smallIt will be ionized until
T > 100K
The only band is FX emissionThe energy difference (13~300K) :QDs
(25 meV) < Powders (62 meV)The main contribution to the energy
shift is the Frhlich interactionNCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabPower dependent PL of ZnO QDs
NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabZnO quantum dots system Binding
Energy investigation
7.4 nm5.3 nm12 nmPowder67 meV60 meV132 meV87 meV Temperature
dependence of the peak intensity of FX emission:
Ea is the activation energy for thermal quenchingZnO crystallite
size(Compressing boundary)
electron-hole interaction
Coulomb potential(binding energy, Eb)NCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics LabZnO quantum dots system Exciton-LO
phonon coupling strength (a0)
Temperature-dependent exciton energy: LO : LO phonon energy, 72
meVa0 : the weighting of the exciton- LO-phonon interactionZnO
crystallite size
coupling strength of exciton-LO phonon
Take only one summation term to disscuss exciton-LO phonon
couplingZnO crystallite sizeEbrecall
5.3 nm ; a0 = 0.19 7.4 nm ; a0 = 0.21 12 nm ; a0 = 0.40 powders
; a0 = 0.59Exciton Bohr radius quenchingNCTUWen-Feng Hsieh
DoPIEOLaser Diagnostics Lab