Modulation of terahertz radiation based on dc-ac-field tuned coherent dynamics of dipolaritons

We propose an effective and convenient way of modulating the THz emission by dc and ac fields based on the coherent dynamics of dipolaritons, quasiparticles formed by the direct exciton, indirect exciton and photon in semiconductor double quantum wells embedded in microcavities. With the help of resonant tunneling, photon-assisted transport, and the dark Floquet states, we may generate efficient THz radiation (with tunable frequency and appreciable radiation power) or quench the THz emission by tuning the ac and dc fields.