Open AccessPhoton-mediated electron transport through a quantum well in an intense terahertz field with spin-orbit coupling
Author(s) -
Cunxi Zhang,
Rui Wang,
Ling-Min Kong
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.4980
Subject(s) - terahertz radiation , physics , photon , spin (aerodynamics) , fano resonance , condensed matter physics , spin–orbit interaction , electron , coupling (piping) , field (mathematics) , polariton , heterojunction , resonance (particle physics) , semiconductor , atomic physics , optoelectronics , materials science , optics , plasmon , quantum mechanics , metallurgy , thermodynamics , mathematics , pure mathematics
We investigate theoretically the intense terahertz field-driven electron-transport through a nonmagnetic semiconductor-heterostructure with spin-orbit coupling. It is found that the frequency-dependent conductivity spectra possess splitting resonance-peaks of asymmetric Fano-type, and multiple-photon-process arises with the increasing amplitude of oscillating field. By changing the external field parameters, the purpose of spin filtering may be realized, and 100% pure spin-polarized current at the frequency of Fano-resonance can also be achieved. These interesting features may be a very useful basis for devising a wide range tunable spin filter and realizing pure spin current.