From spatially indirect to momentum-space indirect exciton by in-plane magnetic field
L. V. Butov, A. V. Mintsev, Yu. E. Lozovik, K. L. Campman, A. C. Gossard
Abstract
In-plane magnetic field is found to change drastically the photoluminescence spectra and kinetics of interwell excitons in GaAs/AlGaAs coupled quantum wells. The effect is due to the in-plane magnetic field induced displacement of the interwell exciton dispersion in a momentum space, which results in the transition from the momentum-space direct exciton ground state to the momentum-space indirect exciton ground state. In-plane magnetic field is, therefore, an effective tool for the exciton dispersion engineering.
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