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Open Access item Reduced radiation losses in electron beam excited propagating plasmons

Authors:Wang, Lei
Cai, Wei
Xiang, Yinxiao
Zhang, Xinzheng
Xu, Jingjun
García de Abajo, F. Javier
Issue Date:2011
Publisher:Optical Society of America
Citation:Optics Express 19: 18713- 18720 (2011)
Abstract:Except for heating losses in metal, propagating plasmons also suffer a lot from radiation losses. In this paper, electron beams are proposed as a way to excite higher-order, multipolar plasmons, which would otherwise not be excited by light, as a way to reduce radiation losses. Specifically, electron excited guided plasmons in a coupled nanoparticle chain and a symmetrical four-wire waveguide are separately discussed. In the coupled nanoparticle chain, the plasmon mode formed by quadrupolar polarized particles with low radiation is efficiently coupled by electron beams. Meanwhile, in the four-wire waveguide, the excited plasmons with zero momentum in the cross-section of each wire possess longer propagating distance than other higher-order plasmons. © 2011 Optical Society of America.
URI:http://hdl.handle.net/10261/54502
Identifiers:doi: 10.1364/OE.19.018713
issn: 1094-4087
Appears in Collections:(CFMAC-IO) Artículos

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