The population inversion and novel magnetoconductivity oscillations induced by resonant microwave irradiation in multi-subband two-dimensional electron systems

摘要

The possibility of a population inversion in a multi-subband two-dimensional (2D) electron system exposed to resonant microwave (MW) radiation and a static magnetic field is shown. Theoretical analysis given here indicates that- the resonant excitation of the third subband, necessary for the population inversion, is accompanied by novel magnetoconductivity oscillations in the 2D electron system formed on the surface of liquid helium.