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Journal of Nanomaterials
Volume 2013 (2013), Article ID 838191, 6 pages
http://dx.doi.org/10.1155/2013/838191
Research Article

Surface Plasmon Resonance in Periodic Hexagonal Lattice Arrays of Silver Nanodisks

1School of Materials Science and Engineering, and Anhui Key Laboratory of Metal Materials and Processing, Anhui University of Technology, Ma-An-Shan, Anhui 243002, China
2Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
3College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received 30 November 2012; Accepted 18 January 2013

Academic Editor: Yue Li

Copyright © 2013 Jinlian Hu 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

The surface plasmon resonance (SPR) of periodic hexagonal lattice arrays of silver nano-disks positioned on glass slides is studied using finite-difference time domain (FDTD) simulations. We investigate numerically the influence of diameter of nano-disks and the gap between nano-disks on SPR transmission spectra and electric field enhancement. We find a strong dependence of resonance wavelength on diameter of the nanodisks. With increasing the gap, electric field enhancement factor could significantly increase and reach a maximum value, which indicates that a special long-range interaction plays an important role. This study is useful for optical modulation applied in near or far field optics, sensing and data storage, and solar cell.