Abstract

The intrinsic optical properties of two-dimensional excitons in quantum wells include rapid radiative recombination, fast electron-spin relaxation, and high-reflectivity modulation. The sample-to-sample variations in the observed properties are shown to be due to phonon, defect, and impurity scattering processes. We identify the various components of the photoluminescence and reflectivity line shapes through extensive optical measurements on a series of GaAs quantum-well samples. We present experimental evidence that demonstrates that the optical reflectivity and the time-resolved-polarized luminescence data may be used as very sensitive probes of the intrinsic and the extrinsic processes.

© 1996 Optical Society of America

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