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Advances in Materials Science and Engineering
Volume 2015, Article ID 195320, 9 pages
http://dx.doi.org/10.1155/2015/195320
Research Article

Plasmonic Filters Based on Lithographically Patterned and Hexagonally Arranged Triangular Silver Nanoparticles Array

1School of Information Engineering, Jimei University, Xiamen, Fujian 361021, China
2Department of Physics, Xiamen University, Xiamen, Fujian 361005, China

Received 28 September 2014; Accepted 13 November 2014

Academic Editor: Rui Vilar

Copyright © 2015 Jing Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A plasmonic filter applied in visible regime is proposed on the basis of hexagonally arranged triangular silver nanoparticle arrays. A method using discrete dipole approximation (DDA) to aid design parameters of the silver nanoparticle arrays is adopted for the filter design and optimization on the basis of computational numerical calculation. The influence of the particle’s thickness and period on the extinction spectrum is studied using the DDA-based computational analysis. Considering the nanofabrication condition, arrays with 40 nm thickness and 230 nm period are selected and fabricated by using nanosphere lithography (NSL) technique. The experimental spectrum is basically in agreement with the theoretical spectrum derived by the DDA calculation.