Direct Optical Detection of a Pure Spin Current in Semiconductor
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AbstractWe predict that a pure spin current in a semiconductor may induce Faraday birefringence even without magnetization. The theory is based on a derived effective interaction between the spin current and a polarized light beam, where the helicity of a photon is mapped to spin 1/2. The effective coupling between the polarized light beam and electron spin current can be realized in direct-gap semiconductors such as GaAs with inherent spin-orbit coupling in valence bands, but it involves neither the Rashba nor the Dresselhaus effect of samples. We estimate the amplitude of the Faraday rotation due to a pure spin current, and we present its incident-beam-angle dependence. We show that this Faraday birefringence can be directly measured.
All Author(s) ListWang J, Liu RB, Zhu BF
Name of Conference5th International Conference on Physics and Applications of Spin-Related Phenomena in Semiconductors
Start Date of Conference03/08/2008
End Date of Conference06/08/2008
Place of ConferenceFoz do Iguacu
Journal nameJournal of Superconductivity and Novel Magnetism
Detailed description(95th International Conference on Physics and Applications of Spin-Related Phenomena in Semiconductors, Aug. 03-06, 2008),
Volume Number23
Issue Number1
PublisherSpringer Verlag (Germany)
Pages53 - 56
LanguagesEnglish-United Kingdom
KeywordsDirect-gap semiconductor; Optical birefringence; Spin current
Web of Science Subject CategoriesPhysics; Physics, Applied; PHYSICS, APPLIED; Physics, Condensed Matter; PHYSICS, CONDENSED MATTER

Last updated on 2021-13-01 at 00:36