High power single-cycle terahertz wave generation using free-electrons to drive dielectric prisms via Cherenkov effect

We proposed and investigated a scheme for generating high power single-cycle terahertz radiation, which uses a low energy free electron beam to drive a trapezoidal dielectric to generate Cherenkov radiation. The generated terahertz pulse is a tunable, single-period, broad-spectrum waveform. Compared with previous Cherenkov terahertz sources, the proposed terahertz source has the characteristics of small size, high efficiency and is easy to implement. In addition, we analyzed the relationship between the generated terahertz pulse radiation intensity and the model parameters by means of theoretical calculation and simulation verification.