Spin current injection by intersubband transitions in quantum wells | Zendy

E. Ya. Sherman | Zendy; Ali Najmaie | Zendy; J. E. Sipe | Zendy

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Spin current injection by intersubband transitions in quantum wells

Author(s) -

E. Ya. Sherman,

Ali Najmaie,

J. E. Sipe

Publication year - 2005

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1882747

Subject(s) - condensed matter physics , spin (aerodynamics) , spin hall effect , quantum well , observable , current (fluid) , physics , spectroscopy , biasing , absorption (acoustics) , spin polarization , voltage , electron , optics , quantum mechanics , laser , thermodynamics

We show that a pure spin current can be injected in quantum wells by theabsorption of linearly polarized infrared radiation, leading to transitionsbetween subbands. The magnitude and the direction of the spin current depend onthe Dresselhaus and Rashba spin-orbit coupling constants and light frequencyand, therefore, can be manipulated by changing the light frequency and/orapplying an external bias across the quantum well. The injected spin currentshould be observable either as a voltage generated via the anomalous spin-Halleffect, or by spatially resolved pump-probe optical spectroscopy.Comment: minor changes, short version publishe

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