title: Anomalous-circular photogalvanic effect in a GaAs/AlGaAs two-dimensional electron gas.
abstract: We have studied the circular photogalvanic effect (CPGE) in a GaAs/AlGaAs two-dimensional electron gas excited by near infrared light at room temperature. The anomalous CPGE observed under normal incidence indicates a swirling current which is realized by a radial spin current via the reciprocal spin-Hall effect. The anomalous CPGE exhibits a cubic cosine dependence on the incidence angle, which is discussed in line with the above interpretation.
authors.affiliation: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, PO Box 912, Beijing 100083, People's Republic of China.
authors.forename: C G
authors.initials: CG
authors.lastname: Tang
authors.forename: Y H
authors.initials: YH
authors.lastname: Chen
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.forename: Z G
authors.initials: ZG
authors.lastname: Wang