Abstract
We give an overview of experiments in which luminescence detection of nonequilibrium phonons in semiconductors is used to study the interaction of acoustic phonons with two-dimensional excitons. Question which are specific for the 2D exciton-phonon interaction are discussed: momentum conservation in the exciton-phonon interaction; role of exciton-exciton collisions; drag of 2D excitons by phonons; 2D excitons as a phonon spectrometer.
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