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LO‐Phonon Instability in Semiconductors in the Presence of Two Laser Fields Plus DC Strong Magnetic Field
Author(s) -
Fonseca A. L. A.,
Nunes O. A. C.
Publication year - 1994
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.2221840206
Subject(s) - condensed matter physics , physics , magnetic field , phonon , plasmon , instability , electron , laser , semiconductor , scattering , optics , quantum mechanics
Phonon scattering by electrons in a bulk semiconductor in two laser fields in the additional presence of a strong (quantizing) magnetic field is discussed. A kinetic equation for the LO‐phonon population is derived, from which the damping rate is calculated. It is found that longitudinal optical lattice waves may be amplified over a relatively narrow range of plasmon wave numbers in the direction perpendicular to the magnetic field direction. Furthermore, the joint action of the three external fields results in a very large amplification rate, in contrast to the zero magnetic field case.