Laser Spectroscopy of Quantum Well and Superlattice Structures.
Interim rept. no. 1, 3 Dec 87-2 Feb 88,
STRATHCLYDE UNIV GLASGOW (UNITED KINGDOM)
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The research described in this report aims to understand the effects of disorder on the lineshapes of exciton luminescence in quantum well QW materials. The low temperature photoluminescence PL and photoluminescence excitation PLE spectra of the excitonic transition in QW material are a sensitive test of interfacial quality. Contributions to the linewidth arise from homogeneous lifetime and inhomogeneous disorder effects. In a typical 50 A well in GaAs, a linewidth at low temperatures of a few meV compares to a typical linewidth about one hundred times smaller in bulk material.
- Physical Chemistry