Field-phase modulation of spin-dependent resonant tunneling through a symmetric double-well with spin–orbit coupling

We study the photon-mediated electron resonance transmission through a symmetric non-magnetic semiconductor double-well structure with the k3 Dresselhaus coupling or the linear-k coupling and two spatially homogeneous oscillating fields confined in the well regions with a relative phase difference. Dresselhaus spin–orbit coupling and the interaction between the incident electron and the two oscillating fields lead to a photon-mediated spin-dependent resonance transmission. It is demonstrated that the relative phase difference between the two oscillating fields plays an important role in determining the characteristics of spin-dependent resonance transmission spectrum. The intensities and positions of spin-dependent resonance peaks can be controlled by adjusting the relative phase difference, which may be helpful in designing the tunable spin filters.