All-electrical time-resolved spin generation and spin manipulation in n-InGaAs

作者：Stepanov I^*; Kuhlen S; Ersfeld M; Lepsa M; Beschoten B

来源：Applied Physics Letters, 2014, 104(6): 062406.

DOI：10.1063/1.4864468

We demonstrate all-electrical spin generation and subsequent manipulation by two successive electric field pulses in an n-InGaAs heterostructure in a time-resolved experiment at zero external magnetic field. The first electric field pulse along the [1 (1) over bar0] crystal axis creates a current-induced spin polarization (CISP) which is oriented in the plane of the sample. The subsequent electric field pulse along [110] generates a perpendicular magnetic field pulse leading to a coherent precession of this spin polarization with 2-dimensional electrical control over the final spin orientation. Spin precession is probed by time-resolved Faraday rotation. We determine the build-up time of CISP during the first field pulse and extract the spin dephasing time and internal magnetic field strength during the spin manipulation pulse.

• 出版日期2014-2-10