THz radiation by the frequency down-shift of Nd:YAG lasers

TL;DR

This paper theoretically analyzes how intense laser interactions with relativistic electron beams can generate coherent THz radiation, potentially producing significant energy and power levels in short pulses.

Contribution

It introduces a theoretical framework for THz generation via laser-electron beam interactions, highlighting practical parameter regimes for high-energy THz pulses.

Findings

Potential THz pulse energy of about 1 mJ per shot

Temporal power of approximately 10 MW

Pulse duration around 100 picoseconds

Abstract

The interaction between an intense laser and a relativistic dense electron beam propagating in the same direction could down-shift the laser frequency. This process, which can be used to generate a coherent THz radiation, is theoretically analyzed. With a set of practically relevant parameters, it is suggested that the radiation energy could reach the order of 1 mJ per shot in the duration of 100 pico-second, or the temporal radiation power of 10 MW.