A model for photocurrent generation in photoconductive antennas

The laser-induced current carrier generation and transport under large biasing voltages in photoconductive materials located in electrode gap region of photoconductive antennas is a complex process involving many different phenomena that interact with each other in intricate ways. Given the large biasing voltages employed, a simple model that assumes that the carriers travel along the biasing field lines allows to retain the basic features of the photocarrier generation process. The model is presented in detail and results for a typical interdigitated electrode are shown to well agree with measures found in the literature.This work was supported in part by the Spanish Inter-Ministerial Commission on Science and Technology (CICYT) under projects TEC201678028-C3-1 and, by FEDER and the Unidad de Excelencia Maria de Maeztu MDM-2016-0600, which is financed by the Agencia Estatal de Investigacion, Spain, and by Catalan Research Group 2017 SGR219.Peer ReviewedPostprint (published version