The Role Of Quantum Electronics In Alternative Energy

The article deals with Quantum electronics, as a field of physics that studies methods of amplification and generation of electromagnetic radiation based on the phenomenon of stimulated radiation in nonequilibrium quantum systems, as well as the properties of amplifiers and generators obtained in this way and their application, a description of the structure of the most important lasers is given, physical foundations of quantum electronics, which are reduced primarily to the application of Einstein's theory of radiation to thermodynamically nonequilibrium systems with discrete energy levels. The article is intended for undergraduates of the Department of Physics, Radio Engineering, who have interests in the field of research and applications of laser radiation, and is aimed at giving them the minimum necessary for that initial information on quantum electronics.

Терагерцовое стимулированное излучение при оптическом резонансном возбуждении германия, легированного мелкими донорами

The mechanisms responsible for terahertz stimulated radiation under resonant intracenter excitation of shallow donors in bulk germanium are considered to be the inversion laser mechanism (ILM) and electron stimulated Raman scattering (e-SRS). The e-SRS cross-section was estimated in the case of resonant excitation of odd levels of a shallow arsenic donor in germanium. The output intensity under resonant excitation of germanium doped with arsenic is calculated. It is shown that at an intensity exceeding the threshold for e-SRS, there should be a competition of mechanisms leading to a decrease in the intensity of ILM, which can be detected by the dependence of the output intensity on time.