Phys. Rev. Lett. 79, 1758–1761 (1997)Resonant Terahertz Optical Sideband Generation from Confined MagnetoexcitonsReceived 20 March 1997; published in the issue dated 1 September 1997 We have probed the internal structure and nonlinear response of magnetoexcitons in GaAs/AlGaAs quantum wells by resonantly driving one- and two-photon internal transitions with intense terahertz electric fields. Strong near-band-gap emission lines, or optical sidebands, appear at frequencies ωNIR±2nωTHz, where ωNIR is the interband exciton-creation frequency, ωTHz is the frequency of the driving field, and n is an integer. The intensity of the sidebands exhibits pronounced enhancement when ωTHz coincides with transitions between magnetically tuned energy levels in the excitons, providing new and accurate information on the internal dynamics of excitons. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.1758
DOI:
10.1103/PhysRevLett.79.1758
PACS:
78.20.Jq, 78.20.Ls, 78.66.-w
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