Observation of electric current induced by optically injected spin current
Mesoscale and Nanoscale Physics
2007-06-19 v1
Abstract
A normally incident light of linear polarization injects a pure spin current in a strip of 2-dimensional electron gas with spin-orbit coupling. We report observation of an electric current with a butterfly-like pattern induced by such a light shed on the vicinity of a crossbar shaped InGaAs/InAlAs quantum well. Its light polarization dependence is the same as that of the spin current. We attribute the observed electric current to be converted from the optically injected spin current caused by scatterings near the crossing. Our observation provides a realistic technique to detect spin currents, and opens a new route to study the spin-related science and engineering in semiconductors.
Cite
@article{arxiv.cond-mat/0608546,
title = {Observation of electric current induced by optically injected spin current},
author = {Xiao-Dong Cui and Shun-Qing Shen and Jian Li and Weikun Ge and Fu-Chun Zhang},
journal= {arXiv preprint arXiv:cond-mat/0608546},
year = {2007}
}
Comments
15 pages, 4 figures