Abstract

Excitonic absorption peaks in undoped quantum-well structures have been extensively investigated for their linear, nonlinear, and electrooptical properties.¹ They are relatively well understood and have implications for various optical and optoelectronic devices. Recently, it has become apparent that electrtical control of carrier densities in modulation-doped quantum wells (MDQWs) may also have interesting applications, as in optical probing of field effect transistors.² The presence of moderate electron densities can have substantial effects on the optical absorption spectra, and it is consequently important to understand the underlying mechanisms.

© 1988 Optical Society of America