Direct optical detection of pure spin current in semiconductors

Abstract

We suggest a new practical scheme for the direct detection of pure spin current by using the two-color Faraday rotation of optical quantum interference process (QUIP) in a semiconductor system. We demonstrate theoretically that the Faraday rotation of QUIP depends sensitively on the spin orientation and wave vector of the carriers, and can be tuned by the relative phase and the polarization direction of the $\omega$ and $2\omega$ laser beams. By adjusting these parameters, the magnitude and direction of the spin current can be detected.

4 pages, 3 figures

References in corpus (4)

• Dissipationless Quantum Spin Current at Room Temperature
• Current-Induced Polarization and the Spin Hall Effect at Room Temperature
• Pure spin current from one-photon absorption of linearly polarized light in noncentrosymmetric semiconductors
• Optical Control of Topological Quantum Transport in Semiconductors

Cited by in corpus (1)

• Spin polarization of electron current through a potential barrier in two-dimensional structures with spin-orbit interaction