Laboratory for Nanophotonics,　
Department of Physics and Astronomy, Rice University, USA

报告摘要: Interference and coherence effects such as subradiance, superradiance, EIT and Fano resonances have been the subject of extensive research in atomic and molecular physics. Recently it has been realized that plasmonic nanostructures offer a highly tunable platform for the systematic studies of such effects. In this talk, I will show how plasmonic coherence effects provide a powerful mechanism for increasing the electric field enhancements generated by plasmons of relevance for surface enhanced spectroscopies such as SERS and SEIRA and LSPR sensing. Examples of systems that will be discussed are: a quantum description of the plasmons in closely coupled nanoparticle dimers[1], small nanoparticle clusters of D6h symmetry (Septamers)[2]; and concentric and nonconcentric planar ring-disk systems (Fanocavities)[3,4]. For Fanocavities, we show that the symmetry breaking can enable couplings  between plasmon modes of differing multipolar order, resulting in a tunable Fano resonance. The LSPR sensitivities of the subradiant mode and the Fano resonances are predicted to be among the largest yet for individual nanostructures[2,3].

[1] J. Zuloaga, E. Prodan, and P. Nordlander, Nano Lett. 9(2009)887-891
[2] N.A. Mirin, K. Bao, and P. Nordlander, J. Phys. Chem. A 113(2009)4028-4034
[3] F. Hao, Y. Sonnefraud, P.V. Dorpe, S.A. Maier, N.J. Halas, and P. Nordlander, Nano Lett. 8(2008)3983
[4] N. Verellen et al., Nano Lett. 9(2009)1663-1667


报告人简介：Prof. Peter Nordlander obtained his Ph.D. degree at Chalmers University of Technology (Sweden) in 1985. He is currently a professor of Electrical and Computer Engineering and of Physics in Rice University.
He has been the fellow of the American Physical Society since 2002 and the American Association for the Advancement of Sciences since 2008. He obtained the Charles Duncan Award at Rice University in 1999.
His research interest is focused on electronic structure calculations, charge transfer processes in atom-surface collisions, electron transport in mesoscopic systems, optical properties of nanoparticles, nanophotonics, plasmonics. He has published over 200 articles in international refereed journals and has given more than 175 invited talks at international conferences, workshops, and university.


联系人：2009年中关村论坛主持人 曹则贤研究员（82649136）（82648115）