Wavelength scaling of THz emissions by two-color filaments in air
Paper in proceeding, 2019

Producing terahertz (THz) radiation by ultrashort laser pulses has become an active field of research because of its promising applications in, e.g., spectroscopy and medical imaging [1]. Efficient THz emitters can be obtained by focusing into air a two-color femtosecond light pulse, composed of fundamental (FH) and second (SH) harmonics, in order to create a plasma channel that acts as a frequency converter [2]. Recent studies [3,4] showed that increasing the pump wavelength enhances the THz energy. However, there is no consensus on the gain factors expected when pushing the FH wavelength, λ0, from the near-IR to the mid-IR range. Clerici et al. [3] reported THz energy yields scaling like λ20 in the range 0.8-1.8 μm. By contrast, according to the local-current model [2,4], the largest THz energy attained by two colors with π/2 relative phase should follow a scaling in λ20 only.

Author

Luc Bergé

The French Alternative Energies and Atomic Energy Commission (CEA)

Alisée Nguyen

The French Alternative Energies and Atomic Energy Commission (CEA)

K. J. Kaltenecker

Technical University of Denmark (DTU)

J. C. Delagnes

University of Bordeaux

Binbin Zhou

Technical University of Denmark (DTU)

E. Cormier

University of Bordeaux

N. Fedorov

University of Bordeaux

R. Bouillaud

University of Bordeaux

D. Descamps

University of Bordeaux

Illia Thiele

Chalmers, Physics, Subatomic and Plasma Physics

Stefan Skupin

Université de Lyon

P. U. Jepsen

Technical University of Denmark (DTU)

2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019

Vol. June 2019 8872607
978-172810469-0 (ISBN)

2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
München, Germany,

Subject Categories

Accelerator Physics and Instrumentation

Atom and Molecular Physics and Optics

Other Physics Topics

DOI

10.1109/CLEOE-EQEC.2019.8872607

More information

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1/3/2024 9