Abstract
In this work we report the dynamics of photo-excited carrier/spin in several InSb/ AlxIn1−xSb based quantum wells using differential transmission spectroscopy. The InSb quantum well layers were selectively pumped and probed by mid-infrared pulses to avoid possible contributions from the barrier materials. Our observations are suggesting that the initial distribution function strongly influences the carrier relaxation dynamics. In addition, we observe spin relaxation times ranging from 1.2-4-.2 ps, longer than the earlier observations in similar structures. We compare our results with our earlier measurements using magneto-optical Kerr effect.
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