Relativistic terahertz radiation generated by direct-laser-accelerated electrons from laser-foil interactions
Artikel i vetenskaplig tidskrift, 2020

A scheme for generating powerful terahertz (THz) radiation based on laser-solid interactions is proposed. When a p-polarized femtosecond laser impinges obliquely on a plane solid target and the target partially blocks the laser energy, surface electrons are extracted to the vacuum and accelerated by the laser fields, forming a low-divergence electron beam. A half-cycle THz radiation pulse is emitted simultaneously as the beam passes by the edge of the target, due to a mechanism similar to coherent transition radiation. Our particle-in-cell simulations show that a relativistic THz pulse can be obtained with an energy of a few tens of millijoule and a conversion efficiency above 1%, with existing joule level femtosecond laser sources.

Författare

Ke Hu

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Longqing Yi

Chalmers, Fysik, Subatomär fysik och plasmafysik

PHYSICAL REVIEW A

2469-9926 (ISSN) 2469-9934 (eISSN)

Vol. 102 2 023530

Skena och skina

Europeiska kommissionen (EU), 2015-10-01 -- 2020-09-30.

Ämneskategorier

Acceleratorfysik och instrumentering

Atom- och molekylfysik och optik

Annan fysik

DOI

10.1103/PhysRevA.102.023530

Mer information

Senast uppdaterat

2020-09-25