Terahertz emission from laser-driven gas plasmas: A plasmonic point of view
Artikel i vetenskaplig tidskrift, 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

Université de Bordeaux

Chalmers, Fysik, Subatomär fysik och plasmafysik

B. Zhou

Danmarks Tekniske Universitet (DTU)

Alisée Nguyen

CEA Dam Ile-de France

E. Smetanina

Göteborgs universitet

R. Nuter

Université de Bordeaux

K. J. Kaltenecker

Danmarks Tekniske Universitet (DTU)

Pedro González De Alaiza Martínez

Université de Bordeaux

J. Dechard

CEA Dam Ile-de France

Luc Bergé

CEA Dam Ile-de France

P. U. Jepsen

Danmarks Tekniske Universitet (DTU)

Stefan Skupin

Université de Bordeaux

Université de Lyon


2334-2536 (ISSN)

Vol. 5 12 1617-1622


Atom- och molekylfysik och optik

Annan fysik

Fusion, plasma och rymdfysik



Mer information

Senast uppdaterat