Electric field-driven coherent spin reorientation of optically generated electron spin packets in InGaAs

Details Electric field-driven coherent spin reorientation of optically generated electron spin packets in InGaAs Electric field-driven coherent spin reorientation of optically generated electron spin packets in InGaAs

2011-07-21

arxiv.org/abs/1107.4307v1

Physics

Condensed Matter

Materials Science

10 pages, 4 figures

Scientific paper

Full electric-field control of spin orientations is one of the key tasks in semiconductor spintronics. We demonstrate that electric field pulses can be utilized for phase-coherent 2{\pi} spin rotation of optically generated electron spin packets in InGaAs epilayers using time-resolved Faraday rotation. Through spin-orbit interaction, the electric-field pulses act as local magnetic field pulses (LMFP). Their field strength is determined by Hanle depolarization measurements. By the temporal control of the LMFP, we can turn on and off electron spin precession and thereby rotate the spin direction into arbitrary orientations in a 2-dimensional plane.

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