| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
|
|
|
|
Detecting Spin Bias with Circularly Polarized Light |
| Feng Liang1**, Ben-Ling Gao1, Yu Gu2, Cheng Yang3 |
1Department of Physics, Huaiyin Institute of Technology, Huaian 223003
2Department of Physics and Siyuan Laboratory, Jinan University, Guangzhou 510632
3School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119
|
|
| Cite this article: |
|
Feng Liang, Ben-Ling Gao, Yu Gu et al 2016 Chin. Phys. Lett. 33 047201 |
|
|
|
|
Abstract We theoretically study the spin transport through a two-terminal quantum dot device under the influence of a symmetric spin bias and circularly polarized light. It is found that the combination of the circularly polarized light and the applied spin bias can result in a net charge current. The resultant charge current is large enough to be measured when properly choosing the system parameters. The resultant charge current can be used to deduce the spin bias due to the fact that there exists a simple linear relation between them. When the external circuit is open, a charge bias instead of a charge current can be induced, which is also measurable by present technologies. These findings indicate a new approach to detect the spin bias by using circularly polarized light.
|
|
|
Received: 28 October 2015
Published: 29 April 2016
|
|
| PACS: |
72.25.Dc
|
(Spin polarized transport in semiconductors)
|
| |
73.23.-b
|
(Electronic transport in mesoscopic systems)
|
| |
73.63.-b
|
(Electronic transport in nanoscale materials and structures)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
