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

doi:10.1109/IRMMW-THz.2019.8874322

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 for this work

Research output: Contribution to book/anthology/report/conference proceeding › Conference abstract in proceeding › Research › peer-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 language	English
Title of host publication	2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
Number of pages	2
Publisher	IEEE
Publication date	Sept 2019
Pages	1-2
Article number	8874322
ISBN (Electronic)	9781538682852
DOIs	https://doi.org/10.1109/IRMMW-THz.2019.8874322
Publication status	Published - Sept 2019
Event	44th International Conference on Infrared, Millimeter, and Terahertz Waves - Maison de la Chimie, Paris, France Duration: 1 Sept 2019 → 6 Sept 2019 http://irmmw-thz2019.org/

Conference

Conference	44th International Conference on Infrared, Millimeter, and Terahertz Waves
Location	Maison de la Chimie
Country/Territory	France
City	Paris
Period	01/09/2019 → 06/09/2019
Internet address	http://irmmw-thz2019.org/

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title = "Conical vs Gaussian Terahertz Emission from Two-Color Laser-Induced Air Plasma Filaments",

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.",

author = "S{\o}rensen, {Christian Buhl} and J{\'e}r{\^o}me Degert and Marc Tondusson and Esben Skovsen and Eric Freysz and Emmanuel Abraham",

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doi = "10.1109/IRMMW-THz.2019.8874322",

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booktitle = "2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)",

publisher = "IEEE",

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note = "44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz ; Conference date: 01-09-2019 Through 06-09-2019",

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Sørensen, CB, Degert, J, Tondusson, M, Skovsen, E, Freysz, E & Abraham, E 2019, Conical vs Gaussian Terahertz Emission from Two-Color Laser-Induced Air Plasma Filaments. in 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)., 8874322, IEEE, pp. 1-2, 44th International Conference on Infrared, Millimeter, and Terahertz Waves, Paris, France, 01/09/2019. https://doi.org/10.1109/IRMMW-THz.2019.8874322

Conical vs Gaussian Terahertz Emission from Two-Color Laser-Induced Air Plasma Filaments. / Sørensen, Christian Buhl; Degert, Jérôme; Tondusson, Marc et al.
2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2019. p. 1-2 8874322.

Research output: Contribution to book/anthology/report/conference proceeding › Conference abstract in proceeding › Research › peer-review

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T1 - Conical vs Gaussian Terahertz Emission from Two-Color Laser-Induced Air Plasma Filaments

AU - Sørensen, Christian Buhl

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AU - Skovsen, Esben

AU - Freysz, Eric

AU - Abraham, Emmanuel

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N2 - 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.

AB - 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.

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PB - IEEE

T2 - 44th International Conference on Infrared, Millimeter, and Terahertz Waves

Y2 - 1 September 2019 through 6 September 2019

ER -

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

Abstract

Conference

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