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Communication Dans Un Congrès Année : 2020

Super resolution spectroscopy for THz-TDS: application to gas spectroscopy

Résumé

Time Domain Spectroscopy resolution is usually limited by the Fourier Heisenberg criteria (FHC) coming from the length of the delay line. We will present a method to exploit THz-TDS spectra providing a 10-fold resolution improvement reaching 120 MHz for width measurements. These results were obtained by modeling and the implementation of a constraint reconstruction algorithm. We tested the methods on temporal traces from gaseous NH3 and were in very good agreement with the values from literature [1] down to a pressure of 5 mbar.
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Dates et versions

hal-03191457 , version 1 (04-08-2021)

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Sophie Eliet, Meriem Mouelhi, A. Cuisset, Francis Hindle, Jean-Francois Lampin, et al.. Super resolution spectroscopy for THz-TDS: application to gas spectroscopy. 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nov 2020, Buffalo, NY (virtual), United States. pp.1-2, ⟨10.1109/IRMMW-THz46771.2020.9370802⟩. ⟨hal-03191457⟩
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