University of Illinois Urbana-Champaign

The Heroes Of Terahertz Synchrotron Spectroscopy

Hearne, Thomas Sandow

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5318.pdf
TI01_5318.pdf

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https://hdl.handle.net/2142/111150

Description

Title
The Heroes Of Terahertz Synchrotron Spectroscopy
Author(s)
Hearne, Thomas Sandow
Contributor(s)
  • Mouret, Gaël
  • Hindle, Francis
  • Mammez, Dominique
  • Mammez, Marie-Hélène
  • Lampin, Jean-François
  • Roy, P.
  • Martin-Drumel, Marie-Aline
  • Pirali, Olivier
Issue Date
2021-06-22
Keyword(s)
Instrument/Technique Demonstration
Date of Ingest
  • 2021-09-24T21:09:07Z
  • 2022-01-21T16:10:27Z
Abstract
Technological innovation is a key driver in the field of molecular spectroscopy, and despite recent leaps forward with chirped-pulse spectroscopy, multiplication chains, dual-comb techniques, and mid-infrared lasers, there remains still a sizeable spectral gap, untouched by these innovations, from around 1 to 10 THz. In this terahertz gap it is still difficult to produce high-resolution broadband spectra. The HEROES project aims to fill the gap, by combining a new generation of far-IR molecular laser with synchrotron radiation.\footnote{Lampin, J.-F. et al. Opt. Lett. (2019) 44, 20}\footnote{Paiges, A. et al. APL Photonics (2016) 1, 031302} The HEROES spectrometer uses heterodyne mixing of a far-IR laser, pumped by a quantum cascade laser, with broadband far-IR synchrotron radiation, within a hot electron bolometer to produce spectra from 1 to 5.5 THz with 5 GHz instantaneous bandwidth and 80 kHz resolution. This resolution is 375 times finer than the ultimate resolution available with the Bruker Fourier-transform infrared (FTIR) spectrometer installed on the AILES beamline at SOLEIL (30 MHz). This allows for far more precise determinations of transition energies, particularly important in the field of astrochemistry. Recent improvements to the HEROES spectrometer will be presented, along with a demonstration of its ability to resolve complicated spectral features, such as transitions in the rotational-torsional spectrum of methanol and its deuterated isotopologues. Further improvements to the technique will also be proposed.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
Text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/111150
DOI
10.15278/isms.2021.TI01

Owning Collections

Abstracts & Presentations - 2021 International Symposium on Molecular Spectroscopy PRIMARY