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Non‐linear absorption of electromagnetic waves by band charge carriers in a laser field
Author(s) -
Fomin V. M.,
Pokatilov E. P.
Publication year - 1976
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.2220780244
Subject(s) - polarization (electrochemistry) , scattering , absorption (acoustics) , electromagnetic radiation , charge carrier , laser , anisotropy , atomic physics , materials science , condensed matter physics , optics , chemistry , physics
The absorption of a probe electromagnetic wave by charge carriers is discussed leading to intra‐band transitions in a laser field in the presence of a magnetic field. The absorption coefficient is calculated for different scattering mechanisms at arbitrary temperatures using the path‐integral method. A stationary combination of the phases of the probe and laser waves is shown to cause an additional absorption. The dependence of the absorption coefficient on the magnetic field applied is studied. The influence of scattering mechanism, type, and reciprocal orientation of polarizations of both the waves on the absorption non‐linearity pattern is analyzed. The change of the probe wave polarization due to the anisotropy of the nonlinear absorption is found. The effects discussed can be used for an effective identification of the main scattering mechanism as well as for an investigation of the charge carrier plasma state.