Title :
Multiphysics modeling of THz photoconductive antennas
Author :
Burford, Nathan M. ; El-Shenawee, Magda
Author_Institution :
Microelectron.-Photonics Program, Univ. of Arkansas, Fayetteville, AR, USA
Abstract :
A new method for modeling terahertz photoconductive antennas (THz-PCAs) is presented. The finite element method solver COMSOL® is utilized to combine Maxwell´s, Poisson´s and the Drift-Diffusion equations into a single 2D/3D multiphysics model. This model can then be used to computationally investigate and design THz-PCAs with more complex geometries compared with current numerical methods. Preliminary results show good agreement between the proposed model and the standard analytical methods for calculating photocurrent generation in THz-PCAs, as well as supporting previously reported experimental observations.
Keywords :
Maxwell equations; Poisson equation; finite element analysis; photoconducting devices; photoconductivity; submillimetre wave antennas; terahertz wave devices; 2D multiphysics model; 3D multiphysics model; COMSOL; Maxwell equation; Poisson equation; THz-PCA; drift-diffusion equation; finite element method; numerical method; photocurrent generation calculation; standard analytical method; terahertz photoconductive antenna multiphysics modeling; Antennas; Electrodes; Equations; Mathematical model; Optical pulses; Photoconductivity; Solid modeling;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956180
