| 报告题目 | Spin photocurrents in semiconductors |
| 报告人 | Dr.CHEN Yonghai |
| 报告人单位 | Institute of Semiconductors, CAS |
| 报告时间 | 2014-03-28 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | Abstract:
Spin photocurrents induced by optical excitation with circularly polarized radiation in semiconductors are reviewed. The absorption of circularly polarized light results in optical spin orientation due to the transfer of the angular momentum of photons to electrons, which causes a directed motion of electrons in unbiased semiconductors. A characteristic feature of this spin photocurrent is that it reverses its direction upon changing the radiation helicity. Three kinds of spin photocurrents, i.e., circular photogalvanic effect, anomalous circular photogalvanic effect and light-induced anomalous Hall effect, and their microscopic mechanisms are discussed. The important role of spin-orbit coupling is revealed. |
