THz-driven electron acceleration used with Plasma diopole oscillation

J. Lee, H. S. Song, D. Park, M. Kumar, M. S. Hur

Previously we proposed the novel mechanism of THz (terahertz) emission sources [1], named plasma dipole oscillation (PDO). PDO can be produced by beating of two colliding laser pulses. In this mechanism, electrons trapped in the beat wave of the laser pulses are displaced and oscillate by electrostatic restoring force. PDO can emit electromagnetic (EM) radiation at the plasma frequency (, where n is the local plasma density) with narrowband spectrum. Recently, we have also obtained high conversion efficiency (~1.48%) from PDO, which is very useful the THz-driven electron accelerator because THz sources based on solid-state are relatively low efficiency and difficultly setup experiment. This presentation will introduce the concept of PDO by using Particle -in-cell (PIC) simulation and how to apply the THz-driven accelerator with PDO.

[1] Kwon, Kyu Been, et al. "High-energy, short-duration bursts of coherent terahertz radiation from an embedded plasma dipole." Scientific reports 8.1 (2018).