Related Experiment Video
Updated: Jun 22, 2026

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements
Published on: December 5, 2025
Time-domain analysis of periodic anisotropic media at oblique incidence: an efficient FDTD implementation
Abstract:
We describe an efficient implementation of the finite-difference time-domain (FDTD) method as applied to lightwave propagation through periodic media with arbitrary anisotropy (birefringence). A permittivity tensor with non-diagonal elements is successfully integrated here with periodic boundary conditions, bounded computation space, and the split-field update technique. This enables modeling of periodic structures using only one period even with obliquely incident light in combination with both monochromatic (sinusoidal) and wideband (time-domain pulse) sources. Comparisons with results from other techniques in four validation cases are presented and excellent agreement is obtained. Our implementation is freely available on the Web.
Related Concept Videos
Discrete-Time Fourier Series
For a discrete-time periodic signal x[n]...
Discrete Fourier Transform
Interference and Diffraction
Discrete-time Fourier transform
One of the notable...
Fast Fourier Transform
The computational efficiency of the FFT becomes...
Linear Approximation in Time Domain
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length, the...
