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Title: Plasmonic Nanostructures: Artificial Molecules
Speaker: Prof. Peter Nordlander (Rice Univ.)
Date & Time: . 3. 3 (Wed), 10:30 – 11:30 a.m.
Place: KAIST 자연동 이태규세미나실
Contact : 화학과 한상우 교수(Tel. 2812)
Abstract: :
Plasmonic Nanostructures: Artificial Molecules

P. Nordlander
Laboratory for Nanophotonics, Department of Physics, Rice University, Houston, TX 77005-1891, USA

The recent observation that metallic nanoparticles possess plasmon resonances that de-pend sensitively on the shape of the nanostructure has led us to a fundamentally new understanding of the plasmon resonances supported by metals of various geometries. This picture- “plasmon hybridization”,[1] reveals that the collective electronic resonances in metallic nanostructures are mesoscopic analogs of the wave functions of simple atoms and molecules, interacting in a manner that is analogous to hybridization in molecular orbital theory. The plasmon hybridization picture can be applied to nanostructures of various geometries, such as “nanoshells”, “nanoeggs”, “nanorice”, nanoparticle aggregates, nanoparticles near extended structures such as metallic films and nanowires, and irregularly shaped particles such as nanostars and nanocrescents. The new theoreti-cal insight gained through this approach provides an important conceptual foundation for the development of new plasmonic structures that can serve as substrates for surface enhanced spectroscopies and subwavelength plasmonic waveguiding and other applica-tions. The talk is comprised of general overview material with particular relevance for chemical applications interspersed with a few more specialized “hot topics” applications such as plasmonic coherence and interference effects and LSPR sensing,[2] Quantum effects,[3] single molecule Surface-Enhanced Raman Scattering (SERS),[4] Sur-face-Enhanced Infrared Absorption (SEIRA),[5] and metallic nanowire waveguiding and sensing applications.[6]

[1] H. Wang et al., Acc. Chem. Res. 40(2007)53 [2] Y. Sonnefraud et al., ACS Nano 4(2010)10.101021/nn901580r [3] J. Zuluoaga et al., Nano Lett. 9(2009)887 [4] D. Ward et al., Nano Lett. 8(2008)919 [5] F. Le et al., ACS Nano 2(2008)707 [6] H. Wei et al., Nano Lett. 8(2008)2497; Y. Fang et al., Nano Lett. 9(2009)2049; Z.P. Li et al., Nano Lett. 9(2009)4383