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.


Ke Hu

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Longqing Yi

Chalmers, Fysik, Subatomär fysik och plasmafysik

Physical Review A

24699926 (ISSN) 24699934 (eISSN)

Vol. 102 2 023530

Skena och skina

Europeiska kommissionen (EU) (EC/H2020/647121), 2015-10-01 -- 2020-09-30.


Acceleratorfysik och instrumentering

Atom- och molekylfysik och optik

Annan fysik



Mer information

Senast uppdaterat