Publications

Spin Detection in GaAs/AlGaAs Quantum Wells by Inverse Spin-Hall Effect

Sakai, Y. and Chatani, T. and Nakagawa, T. and Ritzmann, J. and Ludwig, Ar. and Wieck, A.D. and Oiwa, A.

2019 COMPOUND SEMICONDUCTOR WEEK, CSW 2019 - PROCEEDINGS
Volume: Pages:
DOI: 10.1109/ICIPRM.2019.8819356
Published: 2019

Abstract
In order to realize a novel detection method of a polarization of a photon, we propose the combination of spin Hall effect and quantum conversion from a polarization state of photon to a spin state of electron. Cross-shaped Hall bar of a quantum well was fabricated and was illuminated by circular polarized light. The optically generated electron spin polarization generates the inverse spin Hall voltage via spin-orbit interaction along the orthogonal direction to the applied voltage. We investigated the dependence of inverse spin Hall voltage on the excitation wavelength. The result show two peaks at energies that match to light and heavy hole excitation. © 2019 IEEE.

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