From spatially indirect excitons to momentum-space indirect excitons by an in-plane magnetic field
Abstract
An in-plane magnetic field is found to change drastically the photoluminescence spectra and kinetics of interwell excitons in GaAs/AlxGa1-xAs coupled quantum wells. This effect is due to the in-plane magnetic-field-induced displacement of the interwell exciton dispersion in momentum space, which results in the transition from the momentum-space direct exciton ground state to the momentum-space indirect exciton ground state. An in-plane magnetic field is, therefore, an effective tool for exciton dispersion engineering.
- Publication:
-
Physical Review B
- Pub Date:
- July 2000
- DOI:
- 10.1103/PhysRevB.62.1548
- arXiv:
- arXiv:cond-mat/9912242
- Bibcode:
- 2000PhRvB..62.1548B
- Keywords:
-
- 71.35.-y;
- 73.20.Dx;
- 73.40.Kp;
- 78.55.Cr;
- Excitons and related phenomena;
- III-V semiconductor-to-semiconductor contacts p-n junctions and heterojunctions;
- III-V semiconductors;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Materials Science
- E-Print:
- 4 pages, 3 figures