A modified RC-FDTD algorithm for plasmonics in Drude dispersive media nanostructures

Author

Lesina, Antonino Calá ; Vaccari, Alessandro ; Bozzoli, Alessandro

Author_Institution

Renewable Energies & Environ. Technol. (REET), Fondazione Bruno Kessler (FBK-irst), Trento, Italy

fYear

2012

fDate

26-30 March 2012

Firstpage

687

Lastpage

690

Abstract

A widespread approach in the FDTD analysis of dispersive media is the Recursive Convolution (RC) method. In the Drude version it shows a not so good accuracy in describing the electromagnetic field in the plasmonic resonance regions. We propose here a modified RC algorithm which, by minimizing the time truncation error, guarantees a better accuracy of the solution. We test the modified RC algorithm proposed by analyzing the behavior of Au and Ag noble metal nanospheres exposed to an optical plane wave with respect to the analytical solution.

Keywords

Maxwell equations; finite difference time-domain analysis; light propagation; nanostructured materials; optical dispersion; plasmonics; surface plasmon resonance; Ag; Au; RC-FDTD algorithm; drude dispersive media nanostructures; electromagnetic field; noble metal nanosphere; optical plane wave; plasmonic resonance region; plasmonics; recursive convolution method; time truncation error; Dispersion; Finite difference methods; Gold; Mathematical model; Media; Standards; Time domain analysis; Drude dispersive media; FDTD method; Laplace direct and inverse transform; Recursive Convolution (RC) method; Yee cell; nanostructures; plasmonic resonance;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (EUCAP), 2012 6th European Conference on

Conference_Location

Prague

Print_ISBN

978-1-4577-0918-0

Electronic_ISBN

978-1-4577-0919-7

Type

conf

DOI

10.1109/EuCAP.2012.6206111

Filename

6206111