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Proceedings Paper

Gap plasmon waveguide with a stub: structure for a wavelength selective device
Author(s): Masanobu Haraguchi; Kazunori Iuchi; Hidenori Sokabe; Tatsuya Okuno; Toshihiro Okamoto; Masuo Fukui; Kazumasa Okamoto; Seiichi Tagawa
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Paper Abstract

We have performed the three dimensional (3D) numerical analysis for a gap plasmon waveguide with two stubs in a silver film by using the 3D finite-difference time-domain (FDTD) method. The simulated transmittance shows that such the 3D structure works as a wavelength selective device with submicron size as already predicted in the 2D simulations. We have also fabricated such a structure on a glass substrate by using the focused ion beam method. The width of the gap is around 150 nm. The observed transmittance spectra of the structure have clearly indicated the wavelength dependence and agree well with those obtained by a numerical simulation. Our results show that the structure proposed by us is promising for a compact wavelength selective device.

Paper Details

Date Published: 2 September 2009
PDF: 6 pages
Proc. SPIE 7395, Plasmonics: Nanoimaging, Nanofabrication, and their Applications V, 73950U (2 September 2009); doi: 10.1117/12.825789
Show Author Affiliations
Masanobu Haraguchi, Univ. of Tokushima (Japan)
Kazunori Iuchi, Univ. of Tokushima (Japan)
Hidenori Sokabe, Univ. of Tokushima (Japan)
Tatsuya Okuno, Univ. of Tokushima (Japan)
Toshihiro Okamoto, Univ. of Tokushima (Japan)
Masuo Fukui, Univ. of Tokushima (Japan)
Kazumasa Okamoto, Osaka Univ. (Japan)
Seiichi Tagawa, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 7395:
Plasmonics: Nanoimaging, Nanofabrication, and their Applications V
Satoshi Kawata; Vladimir M. Shalaev; Din Ping Tsai, Editor(s)

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