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 [11ˉ0] 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.
@article{arxiv.1312.4985,
title = {All-electrical time-resolved spin generation and spin manipulation in n-InGaAs},
author = {I. Stepanov and S. Kuhlen and M. Ersfeld and M. Lepsa and B. Beschoten},
journal= {arXiv preprint arXiv:1312.4985},
year = {2014}
}