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Article Dans Une Revue Optica Année : 2018

Terahertz emission from laser-driven gas-plasmas: a plasmonic point of view

Résumé

We investigate terahertz generation in two-color laser-induced gas plasmas. Resonances attributed to plasmonic effects are shown to broaden the emission spectra significantly, when electrons are excited along a direction where the plasma size is smaller than the plasma wavelength. We demonstrate that such resonances can be turned on and off by changing the polarization properties of elliptically-shaped driving laser-pulses. Both 3D Maxwell consistent simulations and experimental results confirm that a significant THz pulse shortening and spectral broadening can be achieved by exploiting the transverse driving laser-beam shape as an additional degree of freedom.
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Dates et versions

hal-01737961 , version 1 (20-03-2018)
hal-01737961 , version 2 (08-01-2019)

Identifiants

Citer

I. Thiele, B. Zhou, A. Nguyen, E. Smetanina, R. Nuter, et al.. Terahertz emission from laser-driven gas-plasmas: a plasmonic point of view. Optica, 2018, 5 (12), pp.1617. ⟨10.1364/optica.5.001617⟩. ⟨hal-01737961v2⟩
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