Abstract
Recently, intersubband relaxation In modulation- doped GaAs/AIxGa1-xAs multiple quantum well structures (MD MQWS) has been observed directly by an IR bleaching technique.1,2 The intersubband time constants determined experimentally are surprisingly long (≈10 ps). But, as the well width increases, electron lifetimes decrease. A well width change from 47 to 59 Å results in a factor of ~2 decrease in relaxation time.
© 1989 Optical Society of America
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