HK, May, 2010 Exciton-plasmom interaction Exciton-plasmom interaction and e and e nhanced energy transfer nhanced energy transfer in active plasmonic nanosystem in active plasmonic nanosystem Qu-Quan WANG Qu-Quan WANG ( ( 王王王 王王王 ) ) [email protected]Wuhan University
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HK, May, 2010 Exciton-plasmom interaction and enhanced energy transfer in active plasmonic nanosystem Qu-Quan WANG ( 王取泉 ) [email protected] Wuhan University.
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HK, May, 2010
Exciton-plasmom interactionExciton-plasmom interactionand eand enhanced energy transfer nhanced energy transfer
in active plasmonic nanosystemin active plasmonic nanosystem
三 , 金属表面等离激元与纳光子发射体相互作用 3.1. Ag 纳米颗粒双频天线增强量子点之间非辐射能量转移 3.2. Ag 纳米线阵列增强量子点之间辐射能量转移 3.3. Ag 纳米环可控增强量子点发射与表面等离激元放大
3.3.11.. Plasmon-enhanced nonradiative ET Plasmon-enhanced nonradiative ET between SQDs by using Ag NPsbetween SQDs by using Ag NPs
Physics process: Plasmon-enhanced FRET
ET distance: < 10 nm
Donor/acceptors: SQDs in mononlayer film
Tool: large Ag NPs
Physics effect: Dual-frequency nanoantenna
Dipole and quadrupole SPRs of Ag NPs
3
4
3
4)10(
30
4
3
1
/)()5/2(1
3
4)(
3Ag
3
2/3SiO2
2
2
2Ag
SiO2Ag
2
SiO2Ag
SiO2
22Ag SiO2Ag
23Ag
Ri
R
RR
)()(
)(Size-dependent polarizability of dipole SPRs of Ag NPs:
receivingemitting
by single-frequency nanoantenna by dual-frequency nanoantenna
W/O nanoantennadonor acceptor
without Ag NPs
FRET dynamics from donor to acceptor
with Ag NPs
Appl. Phys. Lett. 96, 043106 (2010)
FRET efficiency
single
frequency
dual-frequency
antenna
3.3.22. . Plasmon-mediated radiative energy transfer Plasmon-mediated radiative energy transfer between semiconductor quantum dotsbetween semiconductor quantum dots
* * Ag nanoparticles Ag nanoparticles enhance nonradiative enhance nonradiative ET efficiently via dual-frequency antenna ET efficiently via dual-frequency antenna effect effect
* Ag nanoring has tunable “hot spot” and * Ag nanoring has tunable “hot spot” and could be used in plasmon amplificationscould be used in plasmon amplifications
* Multiphoton luminescence from the * Multiphoton luminescence from the hybrid of SQDs and AgNRs are tunablehybrid of SQDs and AgNRs are tunable
Acknowledgement
Profs. Q. K. Xue, J. Zi, J. F. Jia Profs. Z. Y. Zhang, Q. H. Gong Drs. X. Y. Shan, Q. Zhang Drs. L. Zhou, H. M. Gong, S. Xiao