Terahertz emission from laser-driven gas plasmas: A plasmonic point of view
Journal article, 2018

We disclose an unanticipated link between plasmonics and nonlinear frequency down-conversion in laser-induced gas-plasmas. For two-color femtosecond pump pulses, a plasmonic resonance is shown to broaden the terahertz emission spectra significantly. We identify the resonance as a leaky mode, which contributes to the emission spectra whenever electrons are excited along a direction where the plasma size is smaller than the plasma wavelength. As a direct consequence, such resonances can be controlled by changing the polarization properties of elliptically shaped driving laser pulses. Both experimental results and 3D Maxwell consistent simulations confirm that a significant terahertz pulse shortening and spectral broadening can be achieved by exploiting the transverse driving laser beam shape as an additional degree of freedom.


Illia Thiele

University of Bordeaux

Chalmers, Physics, Subatomic and Plasma Physics

B. Zhou

Technical University of Denmark (DTU)

Alisée Nguyen

CEA Dam Ile-de France

E. Smetanina

University of Gothenburg

R. Nuter

University of Bordeaux

K. J. Kaltenecker

Technical University of Denmark (DTU)

Pedro González De Alaiza Martínez

University of Bordeaux

J. Dechard

CEA Dam Ile-de France

Luc Bergé

CEA Dam Ile-de France

P. U. Jepsen

Technical University of Denmark (DTU)

Stefan Skupin

University of Bordeaux

Université de Lyon


2334-2536 (ISSN)

Vol. 5 12 1617-1622

Subject Categories

Atom and Molecular Physics and Optics

Other Physics Topics

Fusion, Plasma and Space Physics



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