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Proceedings Paper

Tailoring coupling of light to local plasmons by using Ag nanorods/dielectric layer/mirror sandwich structures
Author(s): Motofumi Suzuki; Yoshikatsu Imai; Hiroki Tokunaga; Kaoru Nakajima; Kenji Kimura; Takao Fukuoka; Yasushige Mori
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Paper Abstract

The optical properties of the sandwich structures of Ag nanorod array (NRA)/dielectric layer/Ag mirror have been investigated theoretically and experimentally. Calculations based on a simple model by treating the NRAs as uniform effective media indicate that the antireflection condition is realized by changing the thickness of the dielectric layer and that the Ag nanorods absorb most of the incident light. The designed structures have been successfully fabricated by taking advantages of the dynamic oblique-angle deposition technique. Under the experimental antireflection condition, Raman scattering measured on the Ag NRA in the near infrared region exhibits significant enhancement. This indicates that the local electric field close to the Ag nanorods can be controlled by the interference of light in the nanostrutured sandwiches.

Paper Details

Date Published: 10 September 2008
PDF: 10 pages
Proc. SPIE 7041, Nanostructured Thin Films, 70410B (10 September 2008);
Show Author Affiliations
Motofumi Suzuki, Kyoto Univ. (Japan)
Yoshikatsu Imai, Kyoto Univ. (Japan)
Hiroki Tokunaga, Kyoto Univ. (Japan)
Kaoru Nakajima, Kyoto Univ. (Japan)
Kenji Kimura, Kyoto Univ. (Japan)
Takao Fukuoka, Japan Science and Technology Agency (Japan)
Yasushige Mori, Doshisha Univ. (Japan)

Published in SPIE Proceedings Vol. 7041:
Nanostructured Thin Films
Geoffrey B. Smith; Akhlesh Lakhtakia, Editor(s)

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