On the theory of two-dimensional combined magnetoexciton-cyclotron resonances

¹  Institute of Applied Physics, Academy of Sciences of Moldova - 5, Academiei str., MD-2028, Chisinau, Republic of Moldova
²  Department of Physics, Uppsala University - Box 530, SE-751 21, Uppsala, Sweden, EU

Corresponding author: eboard_mjps@phys.asm.md

Received: 10 November 2008
Accepted: 9 February 2009

Abstract

A theory of combined exciton-cyclotron resonance in the quantum well structures is developed for a strong magnetic field. The absorption band structure is calculated for optical quantum transitions with circularly polarized radiation creating a two-dimensional exciton and simultaneously exciting one of the resident electrons from the lowest to the first Landau level. The dipole-active transitions are considered in the second-order perturbation theory taking into account as perturbations the electron-photon interaction and the electron-electron Coulomb interaction. In agreement with the experimental observation it is shown that for polarized light the probability of quantum transition is four times larger than for light polarization.