Variation of Dynamic Fano Resonances in Semiconductor Superlattices Driven by Dc and THz Fields

We describe the dynamic Fano resonances in a biased three-dimensional semiconductor superlattice driven by combined dc and THz fields. The Fano resonances on the Wannier Stark ladders are dominantly changed by the THz field via the band collapse phenomenon. The Fano coupling matrix is closely related to the separated energy distance between the two types of exciton resonances produced by the dc and the THz fields. The dynamic Fano coupling strength increases as the exciton resonance induced by the THz field approaches the Wannier exciton states. KCI Citation Count: 0