Magneto-electric photocurrent generated by direct inter-band transitions in InGaAs/InAlAs two-dimensional electron gas

Abstract

We report observation of magneto-electric photocurrent generated via direct inter-band transitions in an InGaAs/InAlAs two-dimensional electron gas excited by a linearly polarized incident light.The electric current is proportional to the in-plane magnetic field which unbalances the velocities of the photoexcited carriers with opposite spins and consequently generates electric current from a spin photocurrent. The observed light polarization dependence of the electric current is explained microscopically by taking into account of the anisotropy of the photoexcited carrier density in wave vector space. The spin photocurrent can be extracted from the measured current and the conversion coefficient of spin photocurrent to electric current is estimated to be $10^{-3}$$\sim$$10^{-2}$ per Tesla.

References in corpus (6)

• Direct electronic measurement of the spin Hall effect
• Electronic measurement and control of spin transport in Silicon
• Pure spin current from one-photon absorption of linearly polarized light in noncentrosymmetric semiconductors
• Observation of electric current induced by optically injected spin current
• Deduction of Pure Spin Current from Spin Linear and Circular Photogalvanic Effect in Semiconductor Quantum Wells
• Direct measurement of a pure spin current by a polarized light beam

Cited by in corpus (1)

• Theory of magnetoelectric photocurrent generated by direct interband transitions in semiconductor quantum well