Abstract
The acoustic phonon radiation patterns and acoustic phonon spectra due to electron acoustic phonon interaction in double barrier quantum well have been investigated by solving both the kinetic equations for electrons and phonons. The acoustic phonon radiation patterns have strongly pronounced maximum in the directions close to the perpendicular to the quantum well direction. The radiation pattern anisotropy is explained in terms of possible electron transitions, nonequilibrium electron distribution function, and the Hamiltonian of electron‐phonon interactions.
Highlights
Hot acoustic phonon emission represents one of the major channels for thermal energy removal from heterostructures; in addition, detection of phonons emitted by hot electrons provides a valuable tool for investigation of electron-phonon interactions in heterostructures [1,2]
The problem of the spectrum and radiation pattern for acoustic phonons emitted from low dimensional structures has been studied for both quantum wells (QWs) [3,4] and quantum wires [5]
We have investigated the acoustic phonon emission by hot electrons in double barrier heterostructures allowing for electron heating and stimulated phonon emission processes
Summary
The acoustic phonon radiation patterns and acoustic phonon spectra due to electron acoustic phonon interaction in double barrier quantum well have been investigated by solving both the kinetic equations for electrons and phonons. The acoustic phonon radiation patterns have strongly pronounced maximum in the directions close to the perpendicular to the quantum well direction. The radiation pattern anisotropy is explained in terms of possible electron transitions, nonequilibrium electron distribution function, and the Hamiltonian of electron-phonon interactions
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