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Proceedings Paper

Localized surface plasmonic resonant based on bowtie type metallic nanostructure
Author(s): Tingjun Luo; Lin Pang; Weiping Zhang; Matthew Chen
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Paper Abstract

With 3-D finite difference time domain (FDTD) method, we investigate the effect of the geometry parameters and near field distribution on sensitivity of the bowtie type nanoresonator biosensor in terms of refractive index. The calculation results show that the geometry parameters including gap (G), radius of curvature (R) and tip angle (A) have different effects on bulk sensitivity of bowtie metallic nanostructure. The sensitivity linear decreases as G increases while exponential decreases as R increases. Moreover, with A taking 15° to 135°, the sensitivity descends initially and then rises. As for the influence of near field on sensitivity, we can conclude that sensitivity is proportional to maximal local field and the scale factor of fitted curve for R is larger than the one for G.

Paper Details

Date Published: 6 February 2012
PDF: 8 pages
Proc. SPIE 8234, Plasmonics in Biology and Medicine IX, 82340O (6 February 2012); doi: 10.1117/12.908517
Show Author Affiliations
Tingjun Luo, Guangxi Univ. (China)
Lin Pang, Guangxi Univ. (China)
Weiping Zhang, Guangxi Univ. (China)
Matthew Chen, Guangxi Univ. (China)

Published in SPIE Proceedings Vol. 8234:
Plasmonics in Biology and Medicine IX
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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