Volume 85, Number 5, March 2009
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||17 March 2009|
On the theory of two-dimensional combined magnetoexciton-cyclotron resonances
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: email@example.com
Accepted: 9 February 2009
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.
PACS: 71.35.Cc – Intrinsic properties of excitons; optical absorption spectra / 71.35.Ji – Excitons in magnetic fields; magnetoexcitons / 72.25.Fe – Optical creation of spin polarized carriers
© EPLA, 2009
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