Lamb-peak spectrum of the HD (2-0) P(1) line

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Abstract

A saturation spectroscopy measurement of the P(1) line of the (2-0) band in HD is performed in a sensitivecavity-enhanced optical setup involving frequency comb calibration. The spectral signature is that of a Lambpeak, in agreement with a density-matrix model description involving 9 hyperfine components and 16 crossoverresonances oftype. Comparison of the experimental spectra with the simulations yields a rovibrationaltransition frequency at 209 784 242 007 (20) kHz. Agreement is found with a first-principles calculation inthe framework of nonadiabatic quantum electrodynamics within 2σ, where the combined uncertainty is fullydetermined by theory.
Original languageEnglish
Article number023209
JournalPhysical Review Research
Volume2
Issue number2
DOIs
Publication statusPublished - 21 May 2020

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