Abstract
Time-resolved techniques have lately been applied to the study of the dynamics of tunneling in semiconductor quantum well (QW) structures.1,2 The physics of tunneling in coupled QW structures has also been a topic of much recent interest.2,3 We have applied the technique of time-resolved photoluminescence (PL) spectroscopy to investigate tunneling in a novel asymmetric GaAs/AlGaAs double QW structure. We report in this paper the direct observation of PL from a charge-transfer" (CT) state, which is built up by electron and hole tunneling in opposite directions between the QW's.
© 1989 Optical Society of America
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