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Plasmonic surface-wave splitter

Appl. Phys. Lett. 90, 161130 (2007); doi:10.1063/1.2731524

Published 20 April 2007

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Qiaoqiang Gan
Electrical and Computer Engineering Department, Lehigh University, Bethlehem, Pennsylvania 18015

Baoshan Guo, Guofeng Song, and Lianghui Chen
Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

Zhan Fu, Yujie J. Ding, and Filbert J. Bartoli
Electrical and Computer Engineering Department, Lehigh University, Bethlehem, Pennsylvania 18015
The authors present an analysis of a plasmonic surface-wave splitter, simulated using a two-dimensional finite-difference time-domain technique. A single subwavelength slit is employed as a high-intensity nanoscale excitation source for plasmonic surface waves, resulting in a miniaturized light-surface plasmon coupler. With different surface structures located on the two sides of the slit, the device is able to confine and guide light waves of different wavelengths in opposite directions. Within the 15  µm simulation region, it is found that the intensity of the guided light at the interface is roughly two to eight times the peak intensity of the incident light, and the propagation length can reach approximately 42 and 16  µm and at the wavelengths of 0.63 and 1.33  µm, respectively. ©2007 American Institute of Physics
History: Received 15 January 2007; accepted 26 March 2007; published 20 April 2007
Permalink: http://link.aip.org/link/?APPLAB/90/161130/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.79.Gn
    Optical waveguides and couplers
  • 78.68.+m
    Optical properties of surfaces
  • YEAR: 2007

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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