Infrared radio-frequency double-resonance spectroscopy of molecular vibrational-overtone bands using a Fabry–Perot cavity-absorption cell

Ishibashi, Chikako; Saneto, Ryuji; Sasada, Hiroyuki

doi:10.1364/josab.18.001019

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…Microwave radio-frequency (rf) double-resonance spectroscopy was also employed in the vibrational ground state [17]. In the ν 6 band, infrared rf [18,19] and infrared mm-wave [20] double-resonance spectroscopy were performed using the 10-µm CO 2 and N 2 O lasers; in the 2ν 4 band, infrared rf double-resonance spectroscopy was carried out using a 1.65-µm diode laser [21]. However, the ν 1 band has not yet been recorded in sub-Doppler resolution, and neither microwave nor rf spectroscopy has been reported in the v 1 = 1 state.…”

Section: Introductionmentioning

confidence: 99%

Hyperfine-resolved 3.4-μm spectroscopy of CH3I with a widely tunable difference frequency generation source and a cavity-enhanced cell: A case study of a local Coriolis interaction between the
Okubo
¹
,
Nakayama
²
,
Sasada
³

2011
Phys. Rev. A
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Saturated absorption spectra of the ν 1 fundamental band of CH 3 I are recorded with a cavity-enhanced cell and a tunable difference frequency generation source having an 86-cm −1 range. The recorded spectral lines are 250 kHz wide, and most of them are resolved into the individual hyperfine components. The Coriolis interaction between the v 1 = 1 and (v 2 ,v l 6 ) = (1,2 2 ) states locally perturbing the hyperfine structures is analyzed to yield the Coriolis and hyperfine coupling constants with uncertainties similar to those in typical microwave spectroscopy. The spectrometer has demonstrated the potential for precisely determining the energy structure in the vibrational excited states.

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Section: Introductionmentioning

confidence: 99%

Hyperfine-resolved 3.4-μm spectroscopy of CH3I with a widely tunable difference frequency generation source and a cavity-enhanced cell: A case study of a local Coriolis interaction between the
Okubo
¹
,
Nakayama
²
,
Sasada
³

2011
Phys. Rev. A
Self Cite
8
0
5
0
1
View full text Add to dashboard Cite

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“…This can lead to overlapping absorption bands, whose upper states can be coupled through Fermi and Coriolis resonances [7]. Therefore it is difficult to identify the right * lucchesini@ino.cnr.it ro-vibrational quanta, unless sophisticated techniques are employed, such as for example microwave-optical double resonance [8]. This absorption band is very weak, as the dipole moment is even less than the one of CH 3 F and CH 3 Cl, as the C-I bond length is shorter the C-F and C-Cl ones, therefore lower absorption strength for this molecule is expected.…”

Section: Introductionmentioning

confidence: 99%

Diode Laser Overtone Spectroscopy of Methyl Iodide at 850 nm

Lucchesini

2023

Spectroscopy Journal

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Using Tunable Diode Laser Absorption Spectroscopy (TDLAS), 82 CH3I overtone absorption lines were detected for the first time in the range between 11,660 and 11,840 cm−1 (844–857 nm), with strengths estimated around 10−27–10−26 cm/molecule. The lines were measured utilizing commercial heterostructure F–P type diode lasers, multipass cells, and wavelength modulation spectroscopy with the second harmonic detection technique. A high modulation amplitude approach was adopted for the analysis of the line shapes. Self-broadening coefficients were obtained for two lines.

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