Generation of coherent terahertz radiation in 2D nitride-based structures

To analyse the main features of THz radiation generation caused by optical-phonon transit-time resonance in the case of bidimensional transport, a simplified analytical model is developed in terms of some generalized parameters of bulk materials and 2D structures. In the framework of such a model and direct Monte Carlo simulations a considerable increase up to 5 times of the cutoff frequency for THz radiation generation is predicted going from 3D and 2D transport.