Title :

Cavity assisted high-resolution THz spectrometer

Author(s) :

Simon, Fabien [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Elmaleh, Coralie [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Decker, Jean [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Fourmentin, Marc [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Cuisset, A. [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Ducournau, Guillaume [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Photonique THz - IEMN [PHOTONIQUE THZ - IEMN]
Lampin, Jean-Francois [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Photonique THz - IEMN [PHOTONIQUE THZ - IEMN]
Mouret, Gaël [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Hindle, Francis [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]

Journal title :

Photonics and Nanostructures - Fundamentals and Applications

Pages :

101227

Publisher :

Elsevier

Publication date :

2024-02

ISSN :

1569-4410

English keyword(s) :

Terahertz spectroscopy
Cavity enhanced absorption spectroscopy
Cavity ring-down spectroscopy
Trace gas detection
Atmospheric propagation losses

HAL domain(s) :

Sciences de l'ingénieur [physics]/Optique / photonique

English abstract : [en]

The analysis of gases by THz radiation offers a high degree of discrimination due to the narrow linewidths that are observed at low pressure. The sensitivity of existing high-resolution instruments is limited by the ...
Show more >The analysis of gases by THz radiation offers a high degree of discrimination due to the narrow linewidths that are observed at low pressure. The sensitivity of existing high-resolution instruments is limited by the availability and performance of critical system components. This study uses two key components with physical structures at the wavelength scale to realise a high finesse THz cavity. The cavity is characterised and incorporated into a spectrometer. Sensitivity limits of the instrument are experimentally demonstrated for trace and pure gases. Both CEAS (Cavity Enhanced Absorption Spectroscopy) and CRDS (Cavity Ring-Down Spectroscopy) configurations are shown to give sub-ppm detection levels. The cavity has also been used to measure the atmospheric losses.Show less >

Language :

Anglais

Popular science :

Non

ANR Project :

Réalisation d'un Spectromètre THz innovant à très haute résolution spectrale
Cellule plasma à guide d'onde pour la spectroscopie térahertz

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL