Premium
Non‐Linear Ultrasound Absorption in an Electromagnetic Wave Field under Quantum Size Effect Conditions
Author(s) -
Arakelyan M. M.
Publication year - 1978
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.2220890104
Subject(s) - physics , absorption (acoustics) , electron , electromagnetic radiation , resonance (particle physics) , electromagnetic field , condensed matter physics , mean free path , field (mathematics) , atomic physics , quantum mechanics , optics , mathematics , pure mathematics
Non‐linear effects in dimensionally quantized films are considered at amplification of hypersound waves in an electromagnetic wave field with frequency Ω under the condition ql ≫ (q'quasimomentum of a phonon, l free‐path length of an electron). Strong resonance singularities in the sound absorption are observed under the condition qvo v ∼ ω ( v = 1, 2, 3, …, V 0v Fermi velocity of the electron of the vth subband of the film, ω sound wave frequency). The momentum distribution function of electrons is distored. Under certain conditions the absorption is reversed to amplification.