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Magnetoexcitonic optical absorption in semiconductors under strong magnetic fields and intense terahertz radiation in the Voigt configuration

Tong-Yi Zhang and Wei Zhao

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The magnetoexcitonic optical absorption of a GaAs bulk semiconductor driven by a terahertz (THz) field is investigated numerically. The method of the solution of the initial-value problem, in combination with the perfect matched layer technique, is used to calculate the optical susceptibility, with Coulomb interaction, Landau quantization, and THz fields involved nonperturbatively. It shows that there appear replicas and sidebands of magnetoexciton of different Landau levels, which greatly enrich the magneto-optical spectrum in the presence of a driving THz field.


PACS

71.35.Ji Excitons in magnetic fields; magnetoexcitons

78.20.Ls Magnetooptical effects

71.35.Cc Intrinsic properties of excitons; optical absorption spectra

Subjects

Condensed matter: electrical, magnetic and optical

Dates

Issue 6 (June 2008)

Received 11 January 2008, accepted for publication 21 April 2008

Published 29 May 2008



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