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Linewidth of free excitons in quantum wells: Contribution by alloy disorder scattering
P K BASU
Published in -
1990
Volume: 56
   
Issue: 12
Pages: 1110 - 1112
Abstract
A theory is developed for the luminescence linewidth in a quantum well made of ternaries when the two-dimensionally free excitons undergo alloy disorder scattering. The expression for linewidth shows a L-1 dependence on the well width L for infinite barrier height. For thin wells leakage of wave function into the barrier is considered. A comparison between the experimental data and the present values points out the dominant role of alloy disorder scattering. For wells thinner than 40 Å the calculated values decrease with decreasing well width, indicating the importance of surface roughness scattering.
About the journal
JournalApplied Physics Letters
Publisher-
ISSN0003-6951