Abstract
The energy levels of Wannier excitons in a thin (≈200-nm) semiconductor layer are quantized because of confinement and are characterized by the wave vector parallel to the layer k║. In contrast to bulk semiconductors, polariton effects which strongly modify the excitonic dispersion curve leading to polariton transport phenomena in a coherent optical experiment are not expected.1 Thus, in an optically thin semiconductor layer, purely excitonic coherence properties can be studied.
© 1986 Optical Society of America
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