Characterization of current filamentation in GaAs photoconductive switches

摘要

Abstract: ctral and temporal nature of the recombinant radiation from a GaAs photoconductive switch is described. A simultaneous measurement of the electrical avalanche pulse and associated temporal luminescence peak is utilized to extract a propagation velocity for the filamentary tip of approximately 5 $MUL 10$+8$/ cm/s. The measured spectral content of the filaments in a bulk structure is presented for various bias voltages and compared to a theoretical model for band-to-band recombination considering temperature, carrier density, and self-absorption effects.!13