CÁC BÀI BÁO KHOA HỌC 07:17:47 Ngày 16/07/2019 GMT+7
Calculations of the Absorption Coefficient of a Weak Electromagnetic Wave by Free Carriers in Quantum Wells by the Kubo-Mori Method

Analytic expressions for the absorption coefficient of a weak Electromagnetic Wave (EMW) by free carriers for the case of electron-optical phonon scattering in quantum wells are calculated by the Kubo-Mori method in two cases: - The absence of a magnetic field. - The presence of a magnetic field applied perpendicular to its barriers. A different dependence of the absorption coefficient on the temperature T of system, the electromagnetic wave frequency ω, the cyclotron frequency Ω (when a magnetic field is present), and characteristic parameters of a quantum well in comparison with normal semiconductors is obtained. The analytic expressions are numerically evaluated, plotted and discussed for a specific quantum well AlAs/GaAs/AlAs.

 Bau N.Q., Phong T.C.
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