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Sub-Doppler Double-Resonance Spectroscopy of Methane Using a Frequency Comb Probe
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-6191-7926
Université de Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, Rennes, France.
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0001-5790-2185
Umeå University, Faculty of Science and Technology, Department of Physics.
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2021 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 126, no 6, article id 063001Article in journal (Refereed) Published
Abstract [en]

We report the first measurement of sub-Doppler molecular response using a frequency comb by employing the comb as a probe in optical-optical double-resonance spectroscopy. We use a 3.3 μm continuous wave pump and a 1.67 μm comb probe to detect sub-Doppler transitions to the 2ν3 and 3ν3 bands of methane with ∼1.7 MHz center frequency accuracy. These measurements provide the first verification of the accuracy of theoretical predictions from highly vibrationally excited states, needed to model the high-temperature spectra of exoplanets. Transition frequencies to the 3ν3 band show good agreement with the TheoReTS line list.

Place, publisher, year, edition, pages
2021. Vol. 126, no 6, article id 063001
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-180999DOI: 10.1103/PhysRevLett.126.063001ISI: 000617044900003Scopus ID: 2-s2.0-85100872137OAI: oai:DiVA.org:umu-180999DiVA, id: diva2:1534215
Available from: 2021-03-05 Created: 2021-03-05 Last updated: 2023-09-05Bibliographically approved

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Foltynowicz, AleksandraSilander, IsakJohansson, Alexandra C.Silva de Oliveira, ViniciusAxner, Ove

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