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Article Dans Une Revue Physical Review Letters Année : 2021

Sub-Doppler Double-Resonance Spectroscopy of Methane Using a Frequency Comb Probe

Résumé

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 2ν_{3} and 3ν_{3} 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 3ν_{3} band show good agreement with the TheoReTS line list.

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hal-03195936 , version 1 (12-04-2021)

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A. Foltynowicz, Lucile Rutkowski, I. Silander, A.C. Johansson, V. Silva de Oliveira, et al.. Sub-Doppler Double-Resonance Spectroscopy of Methane Using a Frequency Comb Probe. Physical Review Letters, 2021, 126 (6), pp.063001. ⟨10.1103/PhysRevLett.126.063001⟩. ⟨hal-03195936⟩
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