K. Lehmann

activity

20242026

most citedMeasurement and assignment of E-symmetry states in the 6010-6110 cm

^{- 1}

and 8940-9150 cm

^{- 1}

ranges of methane using optical frequency comb double-resonance spectroscopy

1 citations · 1 across the 4 of their papers we have counts for

collaborators

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6 papers · 1 filter

physics.chem-ph2026

Measurement and assignment of $J$ $\geq$ 10 rotational energy levels in the 9510 to 9810 cm $^{- 1}$ and 6590 to 6900 cm $^{- 1}$ ranges of methane using optical frequency comb double-resonance spectroscopy

Yuan Cao, Adrian Hjältén, Vinicius Silva de Oliveira +4

Accurate models of high temperature methane spectra are needed in astrophysics. Previous measurements of methane hot-band transitions in the $P$ 6 $\leftarrow$ $P$ 2 polyad…

physics.chem-ph2026

Rotational energy levels in the ground vibrational state of methane with kHz-level accuracy from comb-referenced double-resonance and Lamb-dip spectroscopies

Vinicius Silva de Oliveira, Isak Silander, Hiroyuki Sasada +4

Methane is a key spherical-top molecule, yet restrictive selection rules for one-photon transitions have prevented determination of its ground state (GS) energies with state-of-the…

physics.chem-ph2026

Optical frequency comb double-resonance spectroscopy of the 9030-9175 cm $^{- 1}$ states of ethylene

Adrian Hjältén, Vinicius Silva de Oliveira, Yuan Cao +3

We use optical-optical double-resonance (OODR) spectroscopy to measure for the first time hot-band transitions of ethylene (C $_{2}$ H $_{4}$ ) between states in the 3000 cm $^{- 1}$ and…

physics.chem-ph2025★ 1 cited

Measurement and assignment of E-symmetry states in the 6010-6110 cm $^{- 1}$ and 8940-9150 cm $^{- 1}$ ranges of methane using optical frequency comb double-resonance spectroscopy

Adrian Hjältén, Vinicius Silva de Oliveira, Michael Rey +3

We use sub-Doppler optical-optical double-resonance (OODR) spectroscopy with a 3.3 $μ$ m single-frequency pump and a cavity-enhanced 1.65 $μ$ m comb probe to measure 33 ladder-type (…

physics.chem-ph2025★ 2 cited

Assignment of collision-induced four-level double-resonance transitions in the 3 $ν$ $_{3}$ $\Leftarrow$ $ν$ $_{3}$ spectral region of methane

Kevin K. Lehmann, Isak Silander, Adrian Hjältén +2

Optical-optical double-resonance (OODR) spectroscopy using a narrow-linewidth pump and a frequency comb probe has previously been used to measure and assign sub-Doppler transitions…

physics.chem-ph2024★ 12 cited

Measurement and assignment of J = 5 to 9 rotational energy levels in the 9070-9370 cm $^{- 1}$ range of methane using optical frequency comb double-resonance spectroscopy

Adrian Hjältén, Vinicius Silva de Oliveira, Isak Silander +6

We use optical-optical double-resonance (OODR) spectroscopy with a continuous wave (CW) pump and a cavity-enhanced frequency comb probe to measure high rotational energy levels of…

Measurement and assignment of J ≥ 10 rotational energy levels in the 9510 to 9810 cm−1 and 6590 to 6900 cm−1 ranges of methane using optical frequency comb double-resonance spectroscopy

Rotational energy levels in the ground vibrational state of methane with kHz-level accuracy from comb-referenced double-resonance and Lamb-dip spectroscopies

Optical frequency comb double-resonance spectroscopy of the 9030-9175 cm−1 states of ethylene

Measurement and assignment of E-symmetry states in the 6010-6110 cm−1 and 8940-9150 cm−1 ranges of methane using optical frequency comb double-resonance spectroscopy

Assignment of collision-induced four-level double-resonance transitions in the 3ν3​ ⇐ ν3​ spectral region of methane

Measurement and assignment of J = 5 to 9 rotational energy levels in the 9070-9370 cm−1 range of methane using optical frequency comb double-resonance spectroscopy

Measurement and assignment of $J$ $\geq$ 10 rotational energy levels in the 9510 to 9810 cm $^{- 1}$ and 6590 to 6900 cm $^{- 1}$ ranges of methane using optical frequency comb double-resonance spectroscopy

Optical frequency comb double-resonance spectroscopy of the 9030-9175 cm $^{- 1}$ states of ethylene

Measurement and assignment of E-symmetry states in the 6010-6110 cm $^{- 1}$ and 8940-9150 cm $^{- 1}$ ranges of methane using optical frequency comb double-resonance spectroscopy

Assignment of collision-induced four-level double-resonance transitions in the 3 $ν$ $_{3}$ $\Leftarrow$ $ν$ $_{3}$ spectral region of methane

Measurement and assignment of J = 5 to 9 rotational energy levels in the 9070-9370 cm $^{- 1}$ range of methane using optical frequency comb double-resonance spectroscopy