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Broadband terahertz heterodyne spectrometer exploiting synchrotron radiation at megahertz resolution

Abstract : A new spectrometer allowing both high resolution and broadband coverage in the terahertz (THz) domain is proposed. This instrument exploits the heterodyne technique between broadband synchrotron radiation and a quantum cascade laser (QCL) based molecular THz laser that acts as the local oscillator (LO). Proof of principle for exploitation for spectroscopy is provided by the recording of molecular absorptions of hydrogen sulfide (H 2 S) and methanol (CH 3 OH) around 1.073 THz. Ultimately, the spectrometer will enable to cover the 1-4 THz region in 5 GHz windows at Doppler resolution.
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https://hal.archives-ouvertes.fr/hal-02319308
Contributor : Marie-Aline Martin-Drumel Connect in order to contact the contributor
Submitted on : Friday, November 8, 2019 - 4:07:26 PM
Last modification on : Wednesday, October 27, 2021 - 1:55:32 PM
Long-term archiving on: : Monday, February 10, 2020 - 8:36:10 AM

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J.F. Lampin, O. Pirali, Z. Buchanan, Sophie Eliet, M.-A. Martin-Drumel, et al.. Broadband terahertz heterodyne spectrometer exploiting synchrotron radiation at megahertz resolution. Optics Letters, Optical Society of America - OSA Publishing, 2019, 44 (20), pp.4985. ⟨10.1364/OL.44.004985⟩. ⟨hal-02319308⟩

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