Triangular-Mesh-Based FDTD Analysis of Two-Dimensional Plasmonic Structures Supporting Backward Waves at Optical Frequencies

Author

Liu, Yaxun ; Sarris, Costas D. ; Eleftheriades, George V.

Author_Institution

Edward S. Rogers Sr. Dept. of Electr. & Comput. Eng., Univ. of Toronto, Ont.

Volume

25

Issue

3

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

938

Lastpage

945

Abstract

In this paper, the periodic analysis of candidate plasmonic topologies for the implementation of left-handed media at optical frequencies is pursued through a triangular-mesh-based finite-difference time-domain (FDTD), equipped with Floquet boundary conditions. The technique is shown to possess excellent convergence and accuracy properties, as opposed to the conventional rectangular-cell-based FDTD. The latter fails to accurately capture the plasmonic resonant modes excited in the lattices under consideration. The studies presented in this paper are particularly aimed at rigorously investigating the possibility of backward-wave propagation in periodic arrays of plasmonic nanoparticles, along with their potential analogy to microwave negative-refractive index transmission-line metamaterials

Keywords

finite difference time-domain analysis; metamaterials; nanoparticles; optical materials; plasmons; refractive index; FDTD; Floquet boundary condition; backward-wave propagation; finite-difference time-domain analysis; left-handed media; negative refractive index; transmission-line metamaterials; two-dimensional plasmonic nanoparticles; Boundary conditions; Convergence; Finite difference methods; Frequency; Lattices; Microwave propagation; Plasmons; Resonance; Time domain analysis; Topology; Finite-difference methods; left-handed metamaterials; plasmonics;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2006.890424

Filename

4147725