Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1594262 | Solid State Communications | 2010 | 4 Pages |
Abstract
We report the use of time-resolved Faraday rotation to induce and probe the polarization of nuclear spins within a set of quantum wells with varying background electron density. The electron density was controlled over a broad range by making use of structures of mixed type-I/type-II GaAs/AlAs quantum wells that spatially separate photoexcited electron–hole pairs. We find that the optically detected nuclear magnetic field decreases quasi-monotonically with increasing electron density. The likely factors responsible for this behavior are increased electron spin-lattice relaxation, increased electron spin delocalization, and dilution of the electron spin polarization.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Bo Li, Patrick Coles, Jeffrey A. Reimer, Philip Dawson, Carlos A. Meriles,