The effects of trigger light pulses on the response speed of semi-insulating GaAs photoconductive switches

In this paper we get the rate equation of photogenerated carriers by solving the rate equation of carriers in a certain condition. By simulation we draw the general rule of variation of photogenerated carriers' density which depends on trigger light pulses as well as their width. Also by experimental tests we achieve the effects of photogenerated carriers on the response speed of Semi-insulating GaAs Photoconductive Switches (PCSS's) and analyze the reasons for the changes of the rising edge of output electrical pulses.