We have measured the free-carrier recombination time in polycrystalline bulk ZnSe to be in the range 7–14 ns at room temperature. We used an excite and probe technique with near-band-edge nanosecond laser pulses to measure the decay of induced free-carrier absorption. We estimate the free-carrier-pair absorption cross section to be in the range (3–6)×10−17 cm2.
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Milward et al. (1991) studied this question.
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