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APS » Journals » Phys. Rev. Lett. » Volume 85 » Issue 25
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Phys. Rev. Lett. 85, 5432–5435 (2000)

Optically Injected Spin Currents in Semiconductors

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R. D. R. Bhat and J. E. Sipe
Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario, Canada M5S 1A7

Received 13 July 2000; published in the issue dated 18 December 2000

We show that quantum interference of one and two photon absorption from a two color field allows one to optically inject ballistic spin currents in unbiased semiconductors. The spin currents can be generated with or without an accompanying electrical current and can be controlled using the relative phase of the two colors. We characterize the injected spin currents using symmetry arguments and an eight-band Kane model.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.5432
DOI:
10.1103/PhysRevLett.85.5432
PACS:
78.20.Ls, 42.65.-k, 72.40.+w
 
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