Title :

Broadband super-resolution Terahertz Time domain spectroscopy applied to Gas analysis

Author(s) :

Eliet, Sophie [Auteur]
Plateforme de Caractérisation Multi-Physiques - IEMN [PCMP - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Cuisset, Arnaud [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Hindle, Francis [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Lampin, Jean-Francois [Auteur]
Photonique THz - IEMN [PHOTONIQUE THZ - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Peretti, Romain [Auteur]
Photonique THz - IEMN [PHOTONIQUE THZ - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Journal title :

IEEE Transactions on Terahertz Science and Technology

Pages :

75-80

Publisher :

Institute of Electrical and Electronics Engineers

Publication date :

2022-01-12

ISSN :

2156-342X

English keyword(s) :

Time domain spectroscopy
Terahertz gas spectroscopy
super resolution spectroscopy

HAL domain(s) :

Physique [physics]/Physique [physics]/Biophysique [physics.bio-ph]
Physique [physics]/Physique [physics]/Optique [physics.optics]
Sciences de l'ingénieur [physics]/Optique / photonique

English abstract : [en]

Commercially available Terahertz (THz) Time domain spectroscopy (THz-TDS) apparatus are used in multiple application fields from material science to biology, and even in industry to measure the thickness of a paint layers. ...
Show more >Commercially available Terahertz (THz) Time domain spectroscopy (THz-TDS) apparatus are used in multiple application fields from material science to biology, and even in industry to measure the thickness of a paint layers. Its broad spectral coverage is of interest for air quality monitoring and atmospheric composition analysis. However, gas spectroscopy needs high resolution that the usual approach in THz-TDS is unable to provide. In this letter, we introduce the concept of constraint reconstruction for super-resolution spectroscopy based on the modeling of the spectroscopic rotational lines in a sparse spectrum. It is demonstrated for low-molecular weight molecules in gas phase that typically have spectra containing a small number of narrow lines over a broad spectrum. This alternative approach directly reconstructing the spectra achieved a resolution improvement factor of 10 compared to the best available resolution by the standard THz-TDS data treatment.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

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

Source :

Harvested from HAL