Gap plasmon waveguide with a stub: structure for a wavelength selective device

Masanobu Haraguchi; Kazunori Iuchi; Hidenori Sokabe; Tatsuya Okuno; Toshihiro Okamoto; Masuo Fukui; Kazumasa Okamoto; Seiichi Tagawa

doi:10.1117/12.825789

2 September 2009 Gap plasmon waveguide with a stub: structure for a wavelength selective device

Masanobu Haraguchi, Kazunori Iuchi, Hidenori Sokabe, Tatsuya Okuno, Toshihiro Okamoto, Masuo Fukui, Kazumasa Okamoto, Seiichi Tagawa

Author Affiliations +

Proceedings Volume 7395, Plasmonics: Nanoimaging, Nanofabrication, and their Applications V; 73950U (2009) https://doi.org/10.1117/12.825789
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

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.

Citation Download Citation

Masanobu Haraguchi, Kazunori Iuchi, Hidenori Sokabe, Tatsuya Okuno, Toshihiro Okamoto, Masuo Fukui, Kazumasa Okamoto, and Seiichi Tagawa "Gap plasmon waveguide with a stub: structure for a wavelength selective device", Proc. SPIE 7395, Plasmonics: Nanoimaging, Nanofabrication, and their Applications V, 73950U (2 September 2009); https://doi.org/10.1117/12.825789

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