期刊
PHYSICAL REVIEW LETTERS
卷 85, 期 25, 页码 5432-5435出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.5432
关键词
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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.
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