Measurements have been made of cw nonlinear far-infrared magnetoabsorption in pure, partially compensated n-GaAs. A new optical observation of the magnetoimpurity resonance has been demonstrated. Analysis in terms of a three-level model gives effective lifetimes of {~}0.5 {μ}s "off resonance" and 30 ns "on resonance," implying the possibility of laser action in the former case.
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Pidgeon et al. (1983) studied this question.
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