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