ON THE TWO POSSIBLE TYPES OF THZ GENERATORS

This paper is the review of our study published earlier in Acta Phys. Polon. A 121, 522 (2012) [7], Phys Lett 378, 1364 (2014) [25], and [1]. It’s aim to pay attention new possibilities related producing types THz generators. The suggested effects are result combining two effects: Gunn-effect a material such as GaAs undulator-like radiation, or 'pumping wave' acting on electrons which undulator field, while second backward effect radiation produced by moving within micro-undulator. It very probable that can be used develop semiconductor-based room temperature source THz-radiation.