Ultrafast Coherent Electron Spin Flip in a Modulation-Doped CdTe Quantum Well
Abstract
We report the experimental realization of coherent electron spin flip in a modulation-doped CdTe quantum well. Coherent spin rotation is realized with an off-resonant laser pulse, which induces a polarization-dependent optical Stark shift in the trion resonance. Complete electron spin flip is made possible by a laser pulse designed to avoid excessive excitations of nearby exciton resonances and minimizes detrimental many-body effects. These results demonstrate an effective approach for ultrafast optical spin control in a complex spin system.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 2009
- DOI:
- 10.1103/PhysRevLett.102.237402
- Bibcode:
- 2009PhRvL.102w7402P
- Keywords:
-
- 78.67.De;
- 42.50.Ex;
- 71.35.Pq;
- 78.47.Fg;
- Quantum wells;
- Optical implementations of quantum information processing and transfer;
- Charged excitons;
- Coherent nonlinear optical spectroscopy