Abstract
Resonantly coupled quantum wells have attracted much recent interest, both from the angle of basic physics and from their potential application in novel electronic and photonic devices.1 Optical spectroscopy has proved to be essential for studying the field dependence of the coupled quantum levels.2-4 However, when studying an electron (hole) resonance by optical techniques, the physics is complicated by the simultaneous photogeneration of holes (electrons). Here we show that this is not a small effect: the resonant field deduced from optical measurements may differ very significantly from the value obtained from electrical experiments.
© 1990 Optical Society of America
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