Implementation of Open Boundary Problems in Photo-Conductive Antennas by Using Convolutional Perfectly Matched Layers

Abstract

A method to simulate an open boundary problem within the Finite Differences Time Domain (FDTD) approach for the emission of photo-conductive antennas is presented here. For this purpose we use convolutional perfectly matched layers (CPML). In these devices, the semiconductor region, where transient currents are present in simulation time, is considered to be an ”active” medium. This medium is extended virtually beyond its boundaries or the computational domain limits. We explain in this paper how to simulate the transient state of a semiconductor in a CPML region as well as the potential of the method developed to solve conventional practical applications.