Lai, C.W., Maletinsky, P., Badolato, A. and Imamoglu, A. (2006) Knight-field-enabled nuclear spin polarization in single quantum dots. Physical Review Letters, 96(16), 167403. (doi: 10.1103/PhysRevLett.96.167403)
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Abstract
We demonstrate dynamical nuclear-spin polarization in the absence of an external magnetic field by resonant circularly polarized optical excitation of a single electron or hole charged quantum dot. Optical pumping of the electron spin induces an effective inhomogeneous magnetic (Knight) field that determines the direction along which nuclear spins could polarize and enables nuclear-spin cooling by suppressing depolarization induced by nuclear dipole-dipole interactions. Our experiments constitute a first step towards a quantum measurement of the Overhauser field.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Badolato, Professor Antonio |
| Authors: | Lai, C.W., Maletinsky, P., Badolato, A., and Imamoglu, A. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Physical Review Letters |
| Publisher: | American Physical Society |
| ISSN: | 0031-9007 |
| ISSN (Online): | 1079-7114 |
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