Conical vs Gaussian Terahertz Emission from Two-Color Laser-Induced Air Plasma Filaments

Christian Buhl Sørensen, Jérôme Degert, Marc Tondusson, Esben Skovsen, Eric Freysz, Emmanuel Abraham*

*Corresponding author

Research output: Contribution to book/anthology/report/conference proceedingConference abstract in proceedingResearchpeer-review

Abstract

We demonstrate that terahertz generation in a two-color laser filament can exhibit conical or Gaussian far-field distribution depending on the experimental conditions. By measuring the spatial distribution of the THz electric field in the 0–3 THz spectral range, we have shown that the conical emission is likely due to photo-induced carriers in the silicon filter used to block the remaining pump laser pulses. However, the terahertz generation can retrieve a Gaussian spatial distribution by replacing the silicon filter by a ceramic one in which the photo-excitation of charge carrier does not occur.
Original languageEnglish
Title of host publication 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
Number of pages2
PublisherIEEE
Publication dateSep 2019
Pages1-2
Article number8874322
ISBN (Electronic)9781538682852
DOIs
Publication statusPublished - Sep 2019
Event44th International Conference on Infrared, Millimeter, and Terahertz Waves - Maison de la Chimie, Paris, France
Duration: 1 Sep 20196 Sep 2019
http://irmmw-thz2019.org/

Conference

Conference44th International Conference on Infrared, Millimeter, and Terahertz Waves
LocationMaison de la Chimie
CountryFrance
CityParis
Period01/09/201906/09/2019
Internet address

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