Interband excitation induced Spin photocurrent in an InGaAs/InAlAs two-dimensional electron gas

Author

Yang, C.L. ; He, H.T. ; Ding, Lu ; Wang, J.N. ; Ge, W.K. ; Cui, L.J. ; Zeng, Y.P.

Author_Institution

Hong Kong Univ. of Sci. & Technol., Hong Kong

fYear

2006

fDate

18-22 Sept. 2006

Firstpage

528

Lastpage

528

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.

Keywords

III-V semiconductors; Shubnikov-de Haas effect; aluminium compounds; excited states; gallium arsenide; indium compounds; photoconductivity; spin polarised transport; spin-orbit interactions; two-dimensional electron gas; 2D electron gas; InGaAs-InAlAs; Rashba spin splitting; Shubnikov-de Haas oscillation; current induced spin polarization; interband excitation; spectral inversion; spin photocurrent; spin-orbit coupling; structure inversion asymmetry; Current measurement; Electrons; Indium compounds; Indium gallium arsenide; Laser excitation; Laser transitions; Optical polarization; Photoconductivity; Photonic crystals; Ultrafast optics;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006. IRMMW-THz 2006. Joint 31st International Conference on

Conference_Location

Shanghai

Print_ISBN

1-4244-0400-2

Electronic_ISBN

1-4244-0400-2

Type

conf

DOI

10.1109/ICIMW.2006.368736

Filename

4222470