Intrasubband fast absorption and emission of terahertz radiation by hot electrons in GaAs/AlGaAs MQW

摘要

The absorption and emission of terahertz radiation connected with intrasubband transitions of hot electrons in GaAs/AlGaAs quantum well structures are investigated experimentally and theoretically. The emission spectra in the spectral range 80-300 #mu#m were obtained. Absorption coefficient and emission spectra were calculated taking into account acoustic and optical phonon (including nonequilibrium phonons), impurity and interface roughness scattering. The temperature of hot electrons was obtained from comparison between calculated and experimentally observed emission spectra.