title: Spectral dependence of spin photocurrent and current-induced spin polarization in an InGaAs/InAlAs two-dimensional electron gas.
abstract: The converse effects of spin photocurrent and current induced spin polarization are experimentally demonstrated in a two-dimensional electron gas system with Rashba spin splitting. Their consistency with the strength of the Rashba coupling as measured for the same system from beating of the Shubnikov-de Haas oscillations reveals a unified picture for the spin photocurrent, current-induced spin-polarization, and spin-orbit coupling. In addition, the observed spectral inversion of the spin photocurrent indicates a system with dominating structure inversion asymmetry.
authors.affiliation: Department of Physics and Institute of Nano-Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
authors.forename: C L
authors.initials: CL
authors.lastname: Yang
authors.forename: H T
authors.initials: HT
authors.lastname: He
authors.forename: Lu
authors.initials: L
authors.lastname: Ding
authors.forename: L J
authors.initials: LJ
authors.lastname: Cui
authors.forename: Y P
authors.initials: YP
authors.lastname: Zeng
authors.forename: J N
authors.initials: JN
authors.lastname: Wang
authors.forename: W K
authors.initials: WK
authors.lastname: Ge