Phase-sensitive bichromatic photoresistance in a two-dimensional electron gas

Article

关键词: QUANTUM INTERFERENCE;    COHERENT CONTROL;    GENERATION;    SEMICONDUCTORS;   

DOI  :  10.1103/PhysRevB.88.245409

来源: SCIE

【 摘 要 】

We have studied microwave photoresistance in a two-dimensional electron system subject to two radiation fields (frequencies omega(1) and omega(2)) using quantum kinetic equation. We have found that when omega(2)/omega(1) = 1 + 2/N, where N is an integer, and both waves have the same polarization, the displacement mechanism gives rise to a new, phase-sensitive photoresistance. This photoresistance oscillates with the magnetic field and can be a good fraction of the total photoresistance under typical experimental conditions. The inelastic mechanism, on the other hand, gives zero phase-sensitive photoresistance if the radiation fields are circularly polarized.

【 授权许可】

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