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