Title

Modeling of Infrared Bandpass Filters Using Three-dimensional FDTD Method

Document Type

Article

Publication Date

2005

Publication Source

Electronics Letters

Volume

41

Issue

16

Inclusive pages

914-915

DOI

http://dx.doi.org/10.1049/el:20051013

Publisher

The Institution of Engineering and Technology

Place of Publication

United Kingdom

ISBN/ISSN

00135194

Abstract

A three-dimensional finite-difference time-domain algorithm was developed to model the spectral behaviour of infrared bandpass filters consisting of plus-shaped openings in a thin gold film. This algorithm incorporates the Lorentz-Drude model to accurately describe the frequency-dependent permittivity of the gold at IR frequencies. The computed transmission spectrum is compared with measured data and excellent agreement between the two results is observed.

Keywords

infrared bandpass filters; thin gold film; 3D FDTD method; transmission spectrum; frequency-dependent permittivity; spectral behaviour; Lorentz-Drude model; IR frequencies; finite-difference time-domain algorithm

Disciplines

Engineering

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