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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 19 — Sep. 12, 2011
  • pp: 18713–18720

Reduced radiation losses in electron beam excited propagating plasmons

Lei Wang, Wei Cai, Yinxiao Xiang, Xinzheng Zhang, Jingjun Xu, and F. Javier García de Abajo  »View Author Affiliations

Optics Express, Vol. 19, Issue 19, pp. 18713-18720 (2011)

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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 OSA

OCIS Codes
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: July 6, 2011
Revised Manuscript: August 24, 2011
Manuscript Accepted: August 25, 2011
Published: September 9, 2011

Lei Wang, Wei Cai, Yinxiao Xiang, Xinzheng Zhang, Jingjun Xu, and F. Javier García de Abajo, "Reduced radiation losses in electron beam excited propagating plasmons," Opt. Express 19, 18713-18720 (2011)

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