Abstract
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 , where is the interband exciton-creation frequency, is the frequency of the driving field, and is an integer. The intensity of the sidebands exhibits pronounced enhancement when coincides with transitions between magnetically tuned energy levels in the excitons, providing new and accurate information on the internal dynamics of excitons.
- Received 20 March 1997
DOI:https://doi.org/10.1103/PhysRevLett.79.1758
©1997 American Physical Society