FDTD Analysis of Temperature-Dependent Electromagnetic Properties in Indium-Antimonide

Ramos-Sanchez S.; Clemente-Arenas M. · 2026 IEEE 2nd Latin American Conference on Antennas and Propagation, LACAP 2026 - Proceedings (2026) · DOI: 10.1109/lacap67012.2026.11471160

Resumen

The Finite-Difference Time-Domain (FDTD) method is a widely adopted numerical technique for solving Maxwell's equations in the time domain. Although FDTD has been extensively employed for electromagnetic wave propagation in non-dispersive materials, many materials exhibit frequencydependent properties that must be properly incorporated into the FDTD formulation. This work investigates the FDTD method for simulating wave propagation in Transverse Magnetic (TM) mode within dispersive media using the Total Field/Scattered Field (TF/SF) technique and Gaussian pulse source. The study examines the Drude model applied to Indium-Antimonide (InSb) and demonstrates how temperature variations alter its response between insulating and metallic states. These findings demonstrate FDTD's capability to accurately capture temperature-dependent permittivity modifications, suggesting InSb as a temperaturesensitive material in the terahertz regime.

Instituciones: Universidad Nacional Tecnológica de Lima Sur