All-optical ejection and control of spin currents from a quantum well

Details All-optical ejection and control of spin currents from a quantum well All-optical ejection and control of spin currents from a quantum well

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrvb..71g5306n&link_type=abstract

Physical Review B, vol. 71, Issue 7, id. 075306

Physics

Optics

4

Magnetooptical Effects, Nonlinear Optics, Optical Creation Of Spin Polarized Carriers, Quantum Wells

Scientific paper

We show that quantum intereference between one and two photon absorption processes can be used to eject spin currents above the barriers of a semiconductor quantum well without applying a bias. The direction of ejection of the carriers and their average spin can be controlled via the phases of the optical fields. The spin current can be generated with or without an accompanying charge current.

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