Subpicosecond photoconductivity overshoot in gallium arsenide observed by electro-optic sampling

Meyer, Kevin; Pessot, Maurice; Mourou, Gerard; Grondin, Robert; Chamoun, Sleiman
December 1988
Applied Physics Letters;12/5/1988, Vol. 53 Issue 23, p2254
Academic Journal
Electro-optic sampling of photoconductive transients on a subpicosecond time scale is used to study hot-carrier transport in GaAs. The results reported here are interpreted as direct time-domain observations of nonequilibrium transport on a subpicosecond time scale and they clearly show both an overshoot and bias-dependent delay at high excitation energy which are consistent with published Monte Carlo predictions.


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