Dark current characterization of photoconductive switches

Jeff C. Adams; R. Aaron Falk; C. David Capps; Stuart G. Ferrier

doi:10.1117/12.59063

12 May 1992 Dark current characterization of photoconductive switches

Jeff C. Adams, R. Aaron Falk, C. David Capps, Stuart G. Ferrier

Proceedings Volume 1632, Optically Activated Switching II; (1992) https://doi.org/10.1117/12.59063
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

Dark current characterization of GaAs photoconductive switches is examined with an emphasis on low frequency current oscillations caused by travelling charge domains in the semiconductor. The voltage controlled negative differential resistance responsible for this phenomenon is due to field enhanced capture of deep level traps and is utilized for extraction of trap parameters using simple thermionic measurements. The GaAs switch investigated is of the avalanche variety and has been shown to produce current filament.ation in the on state. Since this latter effect is associated with a current controlled negative differential resistance region, we speculate on the nature of the transition between the two states.

Citation Download Citation

Jeff C. Adams, R. Aaron Falk, C. David Capps, and Stuart G. Ferrier "Dark current characterization of photoconductive switches", Proc. SPIE 1632, Optically Activated Switching II, (12 May 1992); https://doi.org/10.1117/12.59063

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