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Proceedings Paper

Self-consistent 2D simulations of filament propagation in photoconducting switches
Author(s): Peter W. Rambo; William S. Lawson; C. David Capps; R. Aaron Falk
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Paper Abstract

We present simulations of time-dependent filament propagation in laser- triggered GaAs photoswitches. Unlike previous modeling, our calculations are self-consistent in 2D axisymmetric (r-z) geometry. Realistic electron and hole mobilities as well as field dependent impact ionization are included. We observe filament propagation with speeds Uf approximately equals (formula available in paper), much larger than the saturated carrier drift velocity, usatapproximately equals 107 cm/s. The self-consistently determined filament radius and carrier number density are typically Rfapproximately equals 20-60 micrometers and nfAPEQ10(formula available in paper) respectively. Results are presented for filament propagation in systems with both uniform and nonuniform profiles of background carrier density and electric field.

Paper Details

Date Published: 4 January 1995
PDF: 10 pages
Proc. SPIE 2343, Optically Activated Switching IV, (4 January 1995); doi: 10.1117/12.198646
Show Author Affiliations
Peter W. Rambo, Lawrence Livermore National Lab. (United States)
William S. Lawson, Lawrence Livermore National Lab. (United States)
C. David Capps, Boeing Defense & Space Group (United States)
R. Aaron Falk, Boeing Defense & Space Group (United States)


Published in SPIE Proceedings Vol. 2343:
Optically Activated Switching IV
William R. Donaldson, Editor(s)

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