TITLE

Pure Spin Photocurrents in Low-Dimensional Structures

AUTHOR(S)
Tarasenko, S. A.; Ivchenko, E. L.
PUB. DATE
March 2005
SOURCE
JETP Letters;3/10/2005, Vol. 81 Issue 5, p231
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
As is well known, the absorption of circularly polarized light in semiconductors results in optical orientation of electron spins and helicity-dependent electric photocurrent, and the absorption of linearly polarized light is accompanied by optical alignment of electron momenta. Here, we show that the absorption of unpolarized light leads to the generation of a pure spin current, although both the average electron spin and electric current vanish. We demonstrate this for direct interband and intersubband as well as indirect intraband (Drude-like) optical transitions in semiconductor quantum wells. © 2005 Pleiades Publishing, Inc.
ACCESSION #
16922812

 

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