Modeling of Infrared Bandpass Filters Using Three-dimensional FDTD Method
The Institution of Engineering and Technology
Place of Publication
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.
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
R. Qiang, J. Chen, Tianxiao Zhao, S. Wang, Paul Ruchhoeft, and Marilyn Morgan (2005).
Modeling of Infrared Bandpass Filters Using Three-dimensional FDTD Method. Electronics Letters.41 (16), 914-915. United Kingdom: The Institution of Engineering and Technology.