Publication Details

This article was originally published as: Yu, LY, Cao, JC & Zhang, C, Optical absorption coefficients in two-dimensional semiconductors under strong magnetic field, Journal of Applied Physics, 99(12), June 2006, 123706. Copyright American Institute of Physics. Original journal available here.


We calculate the photon absorption coefficient of hot two-dimensional electrons in the presence of a strong magnetic field. The electrons interact strongly with the optical phonons and the acoustic phonons in quantum wells. The dependence of the optical absorption on the magnetic field is obtained by using the quantum mechanical kinetic theory. It is found that the photon absorption spectrum displays a local magnetophonon resonance. The magnetophonon absorption resulting from inelastic scattering between Landau levels is more pronounced at higher temperature. The effect of subband nonparabolicity on the absorption coefficient is also discussed.

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