3-D FDTD Analysis of Gold-Nanoparticle-Based Photonic Crystal on Slab Waveguide

Author

Jiang, Hao ; Sabarinathan, Jayshri ; Manifar, Touraj ; Mittler, Silvia

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, ON

Volume

27

Issue

13

fYear

2009

fDate

7/1/2009 12:00:00 AM

Firstpage

2264

Lastpage

2270

Abstract

In this paper, metallic photonic crystals (PC) based on 2-D periodic arrays of gold nanoparticles were investigated on indium tin oxide slab waveguides using 3-D finite-difference time domain simulations with nonuniform mesh techniques. The PC effects were studied by changing the lattice constants from 300 to 500 nm. The results obtained indicate that the waveguide-excited plasmon absorption peak of periodic array of gold nanoparticles is tunable from 672 to 707 nm due to the second grating order propagating backward at the grazing angle. The nanoparticle-induced extinction of the waveguide mode was also investigated by varying the slab thickness from 100 to 375 nm. The results show that the extinction peak shifts from 650 to 705 nm. The theoretical results predict that the interactions of the periodic array of gold nanoparticles are strongly affected by the dispersion of the waveguide.

Keywords

diffraction gratings; finite difference time-domain analysis; gold; indium compounds; nanoparticles; nanophotonics; optical arrays; optical waveguides; photonic crystals; 2D periodic arrays; 3D FDTD analysis; Au; ITO; finite-difference time domain simulation; gold nanoparticle; grating order propagation; grazing angle; indium tin oxide slab waveguide; lattice constants; metallic photonic crystal; nanoparticle-induced extinction; nonuniform mesh techniques; size 100 nm to 375 nm; waveguide dispersion; waveguide mode; waveguide-excited plasmon absorption; wavelength 650 nm to 705 nm; wavelength 672 nm to 707 nm; 3-D FDTD; Extinction; gold nanoparticle; nonuniform mesh; photonic crystal; slab waveguide; surface plasmon resonance;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2008.2006577

Filename

4815472