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Carrier recombination rates in strained-layer InGaAs-GaAs quantum wells

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6 Author(s)
Y. -C. Chen ; Dept. of Phys. & Astron., Hunter Coll., City Univ. of New York, NY, USA ; P. Wang ; J. J. Coleman ; D. P. Bour
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The carrier recombination rates in semiconductor quantum wells are found to be structure dependent. Under high levels of excitation they generally do not follow the recombination rule of the bulk material. Through a differential carrier-lifetime measurement in the strained-layer InGaAs/GaAs quantum wells, it is shown that in quantum wells with lower potential barrier or thinner well width, the recombination rates are smaller due to a larger portion of the injected carriers populating the confinement layers where the carriers recombine more slowly owing to dilute carrier volume density

Published in:

IEEE Journal of Quantum Electronics  (Volume:27 ,  Issue: 6 )