Field-assisted resonance tunneling through a symmetric double-barrier structure with spin-orbit coupling

Abstract

We investigate the electron resonance transmission through a symmetric double-barrier structure with the Dresselhaus spin-orbit coupling and an oscillating field applied to the potential-well region. Based on numerical evaluations, it is demonstrated that the multiphoton process results in a two-set multiplet structure of the transmission spectrum. The number of the resonance peaks and the distance between the adjacent peaks can be controlled by adjusting the amplitude and the frequency of the external field, respectively. Moreover, it is shown that a high spin polarization of the photon-mediated transmission probability can be achieved in the case of narrow potential well with a small amplitude of the oscillating field, which may be useful in the tunable spin filters of high efficiency.