Abstract
AbstractIt is shown, that for a light beam of oblique incidence to the crystal surface, a nonequilibrium phonon flux along the surface can exist. The transverse acoustic phonons of the lower branch of spectrum whose free path length is large at low temperatures give the main contribution to the flow. Such phonons arise either immediately at infrared absorption or as the result of the decay of optical and longitudinal acoustic phonons. The phonon energy flux is calculated and shown to be of the same order of magnitude as the incident light flux. The phonon‐electron drag current in the metal film bordering the unexposed surface of the dielectric is considered.
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