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

L. Bergé, A. Nguyen, K. J. Kaltenecker, J. C. Delagnes, B. Zhou, E. Cormier, N. Fedorov, R. Bouillaud, D. Descamps, I. Thiele, S. Skupin, P. U. Jepsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
PublisherIEEE
Publication date1 Jun 2019
Article number8872607
ISBN (Electronic)9781728104690
DOIs
Publication statusPublished - 1 Jun 2019
Event2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference - ICM Centre of the Munich Trade Fair Centre., Munich, Germany
Duration: 23 Jun 201927 Jun 2019
http://www.cleoeurope.org/

Conference

Conference2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference
LocationICM Centre of the Munich Trade Fair Centre.
CountryGermany
CityMunich
Period23/06/201927/06/2019
SponsorEPS Young Minds, The European Physical Society
Internet address
Series2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019

Cite this

Bergé, L., Nguyen, A., Kaltenecker, K. J., Delagnes, J. C., Zhou, B., Cormier, E., Fedorov, N., Bouillaud, R., Descamps, D., Thiele, I., Skupin, S., & Jepsen, P. U. (2019). Wavelength scaling of THz emissions by two-color filaments in air. In Proceedings of 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference [8872607] IEEE. 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 https://doi.org/10.1109/CLEOE-EQEC.2019.8872607