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Proceedings Paper

Numerically study the method to tune the intensity of the surface plasmon
Author(s): Sheng Chung Chen; Tieh Ming Chang; Din Ping Tsai
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Paper Abstract

There are two modes of surface plasmon, radiative and nonradiative. Theoretically, the evanescent surface electric fileds (nonradiative surface plasmon) have their maximum on the surface and exponentially decaying field perpendicular to it. Though the evanescent surface wave can not radiate, the enhancement of the surface electric field has become an important feature in plasmonics. Especially, if one can control the enhancement factor of a plasmonic device, that is, if the intensity of the optical near field which is excited on a plasmonic object can be adjusted exactly, there will be many novel applications implemented. Based on three-dimensional finite-difference time-domain method, we analyze the interactions of the two identical spherical silver particles with optical wave. Our results show that the electric amplitudes at the midpoint of the two particles are dependent on the direction of the alignment. We convince that by changing the angle between the alignment of the particles and the polarization, the local electric intensity would be tuned well.

Paper Details

Date Published: 18 August 2005
PDF: 6 pages
Proc. SPIE 5928, Plasmonic Nano-imaging and Nanofabrication, 59280Y (18 August 2005); doi: 10.1117/12.616753
Show Author Affiliations
Sheng Chung Chen, Far East College (Taiwan)
Tieh Ming Chang, National Taiwan Univ. (Taiwan)
Din Ping Tsai, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 5928:
Plasmonic Nano-imaging and Nanofabrication
Satoshi Kawata; Vladimir M. Shalaev; Din Ping Tsai, Editor(s)

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