Linear Probing of Molecules at Micrometric Distances from a Surface with Sub-Doppler Frequency Resolution

Mudiayi, J. Lukusa; Maurin, Isabelle; Mäshimo, T.; Carvalho, J. C. de Aquino; Bloch, Daniel; Tokunaga, S. K.; Darquié, Benoît; Laliotis, Athanasios

doi:10.1103/physrevlett.127.043201

Cited by 8 publications

(2 citation statements)

References 66 publications

(92 reference statements)

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“…Frequency-stabilized sources in the mid-infrared (mid-IR, from 3 to 20 µm) domain are also needed, in particular for conducting ultra-high resolution molecular spectroscopy measurements in the so-called molecular fingerprint region with far-reaching applications ranging from fundamental physics [1][2][3][4][5][6] and metrology [7][8][9] to astrophysics, remote sensing and Earth sciences 10,11 .…”

Section: Introductionmentioning

confidence: 99%

Highly coherent phase-lock of an 8.1 μm quantum cascade laser to a turn-key mid-IR frequency comb

Chomet

Gacemi

Lopez

et al. 2023

Applied Physics Letters

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A continuous-wave Fabry–Pérot quantum cascade laser (QCL) emitting at 8.1 μm operating in the single mode regime has been coherently phase locked to a turn-key low-noise commercial mid-Infrared (mid-IR) optical frequency comb. The stability of the comb used as a reference is transferred to the QCL resulting in an integrated residual phase error of 0.4 rad. The laser linewidth is narrowed by more than two orders of magnitude reaching sub-kHz level at 1 ms observation time, limited by the spectral purity of the mid-IR comb. Our experiment is an important step toward the development of both powerful and metrology-grade QCLs and fully stabilized QCL frequency comb and opens perspectives for precision measurements and frequency metrology in the mid-IR.

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Section: Introductionmentioning

confidence: 99%

Highly coherent phase-lock of an 8.1 μm quantum cascade laser to a turn-key mid-IR frequency comb

Chomet

Gacemi

Lopez

et al. 2023

Applied Physics Letters

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“…Probing sub-wavelength confined molecules is challenging compared to atoms due to small transition probabilities. However, we have already demonstrated the feasibility of these measurements by selective reflection spectroscopy inside a macroscopic cell [4]. In our experiment, we have used a thin cell (thickness 5.35µm corresponding to 7λ/2) filled with acetylene gas and performed sub-Doppler spectroscopy of the ν 1 +ν 3 rovibrations at 1530nm in the linear regime.…”

mentioning

confidence: 99%

Thin Cell Spectroscopy at Telecommunication Wavelengths: Towards Acetylene based Compact Frequency References

Arellano,

Mouhanna,

DuBurck

et al. 2023

2023 Conference on Lasers and Electro-Optics Europe &Amp; European Quantum Electronics Conference (CLEO/Europe-EQEC)

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Probing molecules in gas cells of subwavelength thickness with high frequency resolution

Arellano,

de Aquino Carvalho,

Mouhanna

et al. 2024

Nat Commun

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Miniaturizing and integrating atomic vapor cells is widely investigated for the purposes of fundamental measurements and technological applications such as quantum sensing. Extending such platforms to the realm of molecular physics is a fascinating prospect that paves the way for compact frequency metrology as well as for exploring light-matter interactions with complex quantum objects. Here, we perform molecular rovibrational spectroscopy in a thin-cell of micrometric thickness, comparable to excitation wavelengths. We operate the cell in two distinct regions of the electromagnetic spectrum, probing ν1 + ν3 resonances of acetylene at 1.530 µm, within the telecommunications wavelength range, as well as the ν3 and ν2 resonances of SF6 and NH3 respectively, in the mid-infrared fingerprint region around 10.55 µm. Thin-cell confinement allows linear sub-Doppler transmission spectroscopy due to the coherent Dicke narrowing effect, here demonstrated for molecular rovibrations. Our experiment can find applications extending to the fields of compact molecular frequency references, atmospheric physics or fundamental precision measurements.

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Linear Probing of Molecules at Micrometric Distances from a Surface with Sub-Doppler Frequency Resolution

Cited by 8 publications

References 66 publications

Highly coherent phase-lock of an 8.1 μm quantum cascade laser to a turn-key mid-IR frequency comb

Highly coherent phase-lock of an 8.1 μm quantum cascade laser to a turn-key mid-IR frequency comb

Thin Cell Spectroscopy at Telecommunication Wavelengths: Towards Acetylene based Compact Frequency References

Probing molecules in gas cells of subwavelength thickness with high frequency resolution

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