Double-resonance spectroscopy
Q. Nie, V. S. de Oliveira, A. Hjältén, I. Silander, K. K. Lehmann, and A. Foltynowicz
Triple-resonance spectroscopy using a cavity-enhanced frequency comb probe
arXiv:2607.15793
Y. Cao, A. Hjältén, V. S. de Oliveira, I. Silander, K. K. Lehmann, and A. Foltynowicz
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
In press. J. Quant. Spectrosc. Radiat. Transf., 110108 (2026)
V. S. de Oliveira, I. Silander, H. Sasada, S. Okubo, H. Inaba, K. K. Lehmann, and A. Foltynowicz
Rotational energy levels in the ground vibrational state of methane with kHz-level accuracy from comb-referenced double-resonance and Lamb-dip spectroscopies
Under revision in Phys. Rev. Lett.
arXiv: 2605.13060
A. Hjältén, V. S. de Oliveira, Y. Cao, I. Silander, K. K. Lehmann, and A. Foltynowicz
Optical frequency comb double-resonance spectroscopy of the 9030-9175 cm-1 states of ethylene
J. Chem. Phys. 165, 014304 (2026).
A. Hjältén, V. S. de Oliveira, M. Rey, I. Silander, K. K. Lehmann, and A. Foltynowicz
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
J. Quant. Spectr. Radiat. Transfer 353, 109831 (2026).
K. K. Lehmann, A. Hjältén, I. Silander, M. Rey, and A. Foltynowicz
Assignment of collision-induced four-level double-resonance transitions in the 3ν₃ ← ν₃ spectral region of methane
J. Chem. Phys. 163, 144304 (2025).
V. S. de Oliveira, A. Hjältén, I. Silander, A. Rosina, M. Rey, K. K. Lehmann, and A. Foltynowicz
Combined frequency comb and continuous wave cavity-enhanced optical-optical double resonance spectrometer in the 1.7 µm range
Opt. Express 33, 38776 (2025).
A. Hjältén, V. S. de Oliveira, I. Silander, A. Rosina, M. Rey, L. Rutkowski, G. Sobon, K. K. Lehmann, and A. Foltynowicz
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
J. Chem. Phys. 161, 124311 (2024).
V. S. de Oliveira, I. Silander, L. Rutkowski, G. Soboń, O. Axner, K. K. Lehmann, and A. Foltynowicz
Addendum: Sub-Doppler optical-optical double-resonance spectroscopy using a cavity-enhanced frequency comb probe
Nat. Commun. 15, 7410 (2024).
V. S. de Oliveira, I. Silander, L. Rutkowski, G. Soboń, O. Axner, K. K. Lehmann, and A. Foltynowicz
Sub-Doppler optical-optical double-resonance spectroscopy using a cavity-enhanced frequency comb probe
Nat. Commun. 15, 161 (2024).
A. Foltynowicz, L. Rutkowski, I. Silander, A. C. Johansson, V. S. de Oliveira, O. Axner, G. Soboń, T. Martynkien, P. Mergo, and K. K. Lehmann
Sub-Doppler double-resonance spectroscopy of methane using a frequency comb probe
Phys. Rev. Lett. 126, 063001 (2021).
A. Foltynowicz, L. Rutkowski, I. Silander, A. C. Johansson, V. S. de Oliveira, O. Axner, G. Soboń, T. Martynkien, P. Mergo, and K. K. Lehmann
Measurement and assignment of double-resonance transitions to the 8900-9100 cm-1 levels of methane
Phys. Rev. A 103, 022810 (2021).
Mid-infrared comb spectroscopy
I. Sadiek, A. A. Balashov, A. Hjältén, M. Rey, O. Egorov, and A. Foltynowicz
Optical frequency comb Fourier transform spectroscopy of the CH₂⁷⁹Br⁸¹Br, CH₂⁷⁹Br₂, and CH₂⁸¹Br₂ isotopologues in the 1180–1210 cm⁻¹ region
Phys. Chem. Chem. Phys. 28, 17299 (2026)
A. Hjältén, I. Sadiek, and A. Foltynowicz
Precision frequency comb spectroscopy of the 14N₂O, 14N15NO, 15N14NO, and 15N₂O isotopologues in the 3300-3550 cm-1 range
J. Quant. Spectr. Radiat. Transfer 340, 109452 (2025).
M. Germann, A. Hjältén, J. Tennyson, S. N. Yurchenko, I. E. Gordon, C. Pett, I. Silander, K. Krzempek, A. Hudzikowski, A. Głuszek, G. Soboń, and A. Foltynowicz
Optical frequency comb Fourier transform spectroscopy of formaldehyde in the 1250 to 1390 cm-1 range: experimental line list and improved MARVEL analysis
J. Quant. Spectr. Radiat. Transf. 312, 108782 (2023).
A. Hjältén, A. Foltynowicz, and I. Sadiek
Line positions and intensities of the ν₁ band of 12CH₃I using mid-infrared optical frequency comb Fourier transform spectroscopy
J. Quant. Spectr. Radiat. Transf. 306, 108646 (2023).
I. Sadiek, A. Hjältén, F. C. Roberts, J. H. Lehman, and A. Foltynowicz
Optical frequency comb-based measurements and revisited assignment of high-resolution spectra of CH₂Br₂ in the 2960 to 3120 cm-1 region
Phys. Chem. Chem. Phys. 25, 8743 (2023).
M. Germann, A. Hjältén, V. Boudon, C. Richard, K. Krzempek, A. Hudzikowski, A. Głuszek, G. Soboń, and A. Foltynowicz
A methane line list with sub-MHz accuracy in the 1250 to 1380 cm-1 range from optical frequency comb Fourier transform spectroscopy
J. Quant. Spectr. Radiat. Transf. 288, 108252 (2022).
A. Hjältén, M. Germann, K. Krzempek, A. Hudzikowski, A. Głuszek, D. Tomaszewska, G. Soboń, and A. Foltynowicz
Optical frequency comb Fourier transform spectroscopy of 14N₂16O at 7.8 µm
J. Quant. Spectrosc. Radiat. Transfer 271, 107734 (2021).
I. Sadiek, A. Hjältén, F. Senna Vieira, C. Lu, M. Stuhr, and A. Foltynowicz
Line positions and intensities of the ν₄ band of methyl iodide using mid-infrared optical frequency comb Fourier transform spectroscopy
J. Quant. Spectr. Radiat. Transf. 255, 107263 (2020).
Comb-based Fourier transform spectroscopy method
L. Rutkowski, P. Masłowski, A. C. Johansson, A. Khodabakhsh, and A. Foltynowicz
Optical frequency comb Fourier transform spectroscopy with sub-nominal resolution and precision beyond the Voigt profile
J. Quant. Spectr. Radiat. Transf. 204, 63 (2018).
L. Rutkowski, A. C. Johansson, G. Zhao, T. Hausmaninger, A. Khodabakhsh, O. Axner, and A. Foltynowicz
Sensitive and broadband measurement of dispersion in a cavity using a Fourier transform spectrometer with kHz resolution
Opt. Express 25, 21711 (2017).
P. Masłowski, K. F. Lee, A. C. Johansson, A. Khodabakhsh, G. Kowzan, L. Rutkowski, A. A. Mills, C. Mohr, J. Jiang, M. E. Fermann, and A. Foltynowicz
Surpassing the path-limited resolution of a Fourier transform spectrometer with frequency combs
Phys. Rev. A 93, 021802(R) (2016).
