Premium
The Photoexcited Flow of Nonequilibrium Phonons along a Crystal Surface
Author(s) -
Blokh M. D.,
Entin M. V.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221260207
Subject(s) - phonon , surface phonon , condensed matter physics , crystal (programming language) , non equilibrium thermodynamics , transverse plane , flux (metallurgy) , physics , heat flux , energy flux , mean free path , materials science , optics , scattering , heat transfer , mechanics , quantum mechanics , structural engineering , computer science , engineering , metallurgy , programming language
It 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.