Wavelength scaling of THz emissions by two-color filaments in air
Paper i 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.

Författare

Luc Bergé

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

Alisée Nguyen

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

K. J. Kaltenecker

Danmarks Tekniske Universitet (DTU)

J. C. Delagnes

Université de Bordeaux

Binbin Zhou

Danmarks Tekniske Universitet (DTU)

E. Cormier

Université de Bordeaux

N. Fedorov

Université de Bordeaux

R. Bouillaud

Université de Bordeaux

D. Descamps

Université de Bordeaux

Illia Thiele

Chalmers, Fysik, Subatomär fysik och plasmafysik

Stefan Skupin

Université de Lyon

P. U. Jepsen

Danmarks Tekniske Universitet (DTU)

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

Vol. June 2019 8872607

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

Ämneskategorier

Acceleratorfysik och instrumentering

Atom- och molekylfysik och optik

Annan fysik

DOI

10.1109/CLEOE-EQEC.2019.8872607

Mer information

Senast uppdaterat

2020-01-28