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Proceedings Paper

Variable-focusing surface plasmon dielectric lens using air-gap modulation
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Paper Abstract

We present a variable-focusing surface plasmon dielectric lens using the air-gap modulation. Based on the modal analysis of the planar slab waveguide consisting of the dielectric slab over the metal substrate, we examine the transmission characteristics of the single air-metal surface plasmon polariton (SPP) mode through the planar slab waveguide. Our simulation results reveal that the 2π modulation of the phase of the transmitted SPP mode can be realized. By using the lens with parabolic shape, the SPP mode converges and focuses to one point. It is shown that the dynamic modulation of the air-gap width gives rise to the dynamic change in the focal length.

Paper Details

Date Published: 28 August 2008
PDF: 8 pages
Proc. SPIE 7033, Plasmonics: Nanoimaging, Nanofabrication, and Their Applications IV, 703323 (28 August 2008); doi: 10.1117/12.795771
Show Author Affiliations
Junghyun Park, Seoul National Univ. (South Korea)
Hwi Kim, Seoul National Univ. (South Korea)
Joonku Hahn, Seoul National Univ. (South Korea)
Byoungho Lee, Seoul National Univ. (South Korea)

Published in SPIE Proceedings Vol. 7033:
Plasmonics: Nanoimaging, Nanofabrication, and Their Applications IV
Satoshi Kawata; Vladimir M. Shalaev; Din Ping Tsai, Editor(s)

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