Publications
62 results found
Arellano GG, de Aquino Carvalho JC, Mouhanna H, et al., 2024, Probing molecules in gas cells of subwavelength thickness with high frequency resolution., Nat Commun, Vol: 15
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.
Dely H, Chomet B, Bonazzi T, et al., 2023, Heterodyne coherent detection of phase modulation in a mid-infrared unipolar device., Opt Express, Vol: 31, Pages: 30876-30883
Phase modulation is demonstrated in a quantum Stark effect modulator designed to operate in the mid-infrared at wavelength around 10 µm. Both phase and amplitude modulation are simultaneously resolved through the measurement of the heterodyne signal arising from the beating of a quantum cascade laser with a highly stabilized frequency comb. The highest measured phase shift is more than 5 degrees with an associated intensity modulation of 5 %. The experimental results are in full agreement with our model in which the complex susceptibility is precisely described considering the linear voltage dependent Stark shift of the optical resonance.
Chomet B, Gacemi D, Lopez O, et al., 2023, Highly coherent phase-lock of an 8.1 μm quantum cascade laser to a turn-key mid-IR frequency comb, APPLIED PHYSICS LETTERS, Vol: 122, ISSN: 0003-6951
Fiechter MR, Haase PAB, Saleh N, et al., 2022, Toward Detection of the Molecular Parity Violation in Chiral Ru(acac)<sub>3</sub> and Os(acac)<sub>3</sub>, JOURNAL OF PHYSICAL CHEMISTRY LETTERS, Vol: 13, Pages: 10011-10017, ISSN: 1948-7185
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- Citations: 4
Saemian M, Gacemi D, Chomet B, et al., 2022, Highly Sensitive Room Temperature Heterodyne Detection with Stabilized Qc Lasers, 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Publisher: IEEE, ISSN: 2162-2027
Cahuzac N, Liu Y, Saffre M, et al., 2022, High Precision, SI-traceable, Mid-Infrared Molecular Spectroscopy, Joint Conference of the European-Frequency-and-Time-Forum / IEEE International Frequency Control Symposium (EFTF/IFCS), Publisher: IEEE, ISSN: 2327-1914
Barontini G, Blackburn L, Boyer V, et al., 2021, Measuring the stability of fundamental constants with a network of clocks, Publisher: arXiv
The detection of variations of fundamental constants of the Standard Modelwould provide us with compelling evidence of new physics, and could lift theveil on the nature of dark matter and dark energy. In this work, we discuss howa network of atomic and molecular clocks can be used to look for suchvariations with unprecedented sensitivity over a wide range of time scales.This is precisely the goal of the recently launched QSNET project: A network ofclocks for measuring the stability of fundamental constants. QSNET will includestate-of-the-art atomic clocks, but will also develop next-generation molecularand highly charged ion clocks with enhanced sensitivity to variations offundamental constants. We describe the technological and scientific aims ofQSNET and evaluate its expected performance. We show that in the range ofparameters probed by QSNET, either we will discover new physics, or we willimpose new constraints on violations of fundamental symmetries and a range oftheories beyond the Standard Model, including dark matter and dark energymodels.
Darquie B, Saleh N, Tokunaga SK, et al., 2021, Valence-shell photoelectron circular dichroism of ruthenium(iii)-tris-(acetylacetonato) gas-phase enantiomers, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 23, Pages: 24140-24153, ISSN: 1463-9076
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- Citations: 6
Mudiayi JL, Maurin I, Mashimo T, et al., 2021, Linear Probing of Molecules at Micrometric Distances from a Surface with Sub-Doppler Frequency Resolution, PHYSICAL REVIEW LETTERS, Vol: 127, ISSN: 0031-9007
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- Citations: 2
Carvalho JCDA, Mudiayi JL, Resendiz-Vasquez P, et al., 2021, High-resolution molecular spectroscopy in micrometric thin cells, Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (CLEO/Europe-EQEC), Publisher: IEEE
Gauthier ES, Abella L, Hellou N, et al., 2020, Long-Lived Circularly Polarized Phosphorescence in Helicene-NHC Rhenium(I) Complexes: The Influence of Helicene, Halogen, and Stereochemistry on Emission Properties, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, Vol: 59, Pages: 8394-8400, ISSN: 1433-7851
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- Citations: 49
Lecordier L, Moufarej E, Kozlova O, et al., 2020, <i>Mise en Pratique</i> of the New Kelvin Using Doppler Broadening Thermometry with a Direct Link to the Primary Frequency Standards, Joint Conference of the IEEE International Frequency Control Symposium (IEEE IFCS) and IEEE International Symposium on Applications of Ferroelectrics (IEEE IFAS), Publisher: IEEE, ISSN: 1099-4734
Diouf ML, Cozijn FMJ, Darquie B, et al., 2019, Lamb-dips and Lamb-peaks in the saturation spectrum of HD, OPTICS LETTERS, Vol: 44, Pages: 4733-4736, ISSN: 0146-9592
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- Citations: 40
Cournol A, Manceau M, Pierens M, et al., 2019, A new experiment to test parity symmetry in cold chiral molecules using vibrational spectroscopy, QUANTUM ELECTRONICS, Vol: 49, Pages: 288-292, ISSN: 1063-7818
Dang BAT, Santagata R, Manceau M, et al., 2019, High-Precision Mid-Infrared Spectroscopy with a Widely Tuneable SI-Traceable Frequency-Comb-Stabilised QCL, 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Publisher: IEEE, ISSN: 2162-2027
Mudiayi JL, Mashimo T, Maurin I, et al., 2019, Probing Molecules next to Surfaces, Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (CLEO/Europe-EQEC), Publisher: IEEE
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- Citations: 1
Fischer J, Fellmuth B, Gaiser C, et al., 2018, The Boltzmann project, METROLOGIA, Vol: 55, Pages: R1-R20, ISSN: 0026-1394
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- Citations: 37
Saleh N, Bast R, Vanthuyne N, et al., 2018, An oxorhenium complex bearing a chiral cyclohexane-1-olato-2-thiolato ligand: Synthesis, stereochemistry, and theoretical study of parity violation vibrational frequency shifts, CHIRALITY, Vol: 30, Pages: 147-156, ISSN: 0899-0042
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- Citations: 5
Segal DM, Lorent V, Dubessy R, et al., 2018, Studying fundamental physics using quantum enabled technologies with trapped molecular ions, JOURNAL OF MODERN OPTICS, Vol: 65, Pages: 490-500, ISSN: 0950-0340
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- Citations: 2
Tran DBA, Santagata R, Lopez O, et al., 2018, High-precision mid-IR molecular spectroscopy with traceability to primary standards, Conference on Precision Electromagnetic Measurements (CPEM), Publisher: IEEE
Moufarej E, Kozlova O, Martin C, et al., 2018, Implementing the new kelvin by laser spectroscopy, Conference on Precision Electromagnetic Measurements (CPEM), Publisher: IEEE
Tokunaga SK, Hendricks RJ, Tarbutt MR, et al., 2017, High-resolution mid-infrared spectroscopy of buffer-gas-cooled methyltrioxorhenium molecules, New Journal of Physics, Vol: 19, ISSN: 1367-2630
We demonstrate cryogenic buffer-gas cooling of gas-phase methyltrioxorhenium (MTO). This molecule is closely related to chiral organometallic molecules where the parity-violating energy differences between enantiomers is measurable. The molecules are produced with a rotational temperature of approximately 6 K by laser ablation of an MTO pellet inside a cryogenic helium buffer gas cell. Facilitated by the low temperature, we demonstrate absorption spectroscopy of the 10.2 μm antisymmetric Re=O stretching mode of MTO with a resolution of 8 MHz and a frequency accuracy of 30 MHz. We partially resolve the hyperfine structure and measure the nuclear quadrupole coupling of the excited vibrational state. Our ability to produce dense samples of complex molecules of this type at low temperatures represents a key step towards a precision measurement of parity violation in a chiral species.
Asselin P, Berger Y, Huet TR, et al., 2017, Characterising molecules for fundamental physics: an accurate spectroscopic model of methyltrioxorhenium derived from new infrared and millimetre-wave measurements, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 19, Pages: 4576-4587, ISSN: 1463-9076
Precise spectroscopic analysis of polyatomic molecules enables many striking advances in physical chemistry and fundamental physics. We use several new high-resolution spectroscopic devices to improve our understanding of the rotational and rovibrational structure of methyltrioxorhenium (MTO), the achiral parent of a family of large oxorhenium compounds that are ideal candidate species for a planned measurement of parity violation in chiral molecules. Using millimetre-wave and infrared spectroscopy in a pulsed supersonic jet, a cryogenic buffer gas cell, and room temperature absorption cells, we probe the ground state and the Re[double bond, length as m-dash]O antisymmetric and symmetric stretching excited states of both CH3187ReO3 and CH3185ReO3 isotopologues in the gas phase with unprecedented precision. By extending the rotational spectra to the 150–300 GHz range, we characterize the ground state rotational and hyperfine structure up to J = 43 and K = 41, resulting in refinements to the rotational, quartic and hyperfine parameters, and the determination of sextic parameters and a centrifugal distortion correction to the quadrupolar hyperfine constant. We obtain rovibrational data for temperatures between 6 and 300 K in the 970–1015 cm−1 range, at resolutions down to 8 MHz and accuracies of 30 MHz. We use these data to determine more precise excited-state rotational, Coriolis and quartic parameters, as well as the ground-state centrifugal distortion parameter DK of the 187Re isotopologue. We also account for hyperfine structure in the rovibrational transitions and hence determine the upper state rhenium atom quadrupole coupling constant eQq′.
Dang BAT, Santagata R, Argence B, et al., 2017, Precise Molecular Spectroscopy Using a Stable and Tuneable Frequency Comb, Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (CLEO/Europe-EQEC), Publisher: IEEE
Santagata R, Tran DBA, Lopez O, et al., 2017, Frequency comb-assisted QCL stabilization for high resolution molecular spectroscopy, Joint Conference of the European-Frequency-and-Time-Forum / IEEE International Frequency Control Symposium (EFTF/IFCS), Publisher: IEEE, Pages: 468-470, ISSN: 2327-1914
Mudiayi JL, Darquie B, Tokunaga SK, et al., 2017, High-resolution spectroscopy on a micrometric layer of molecular vapor, Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (CLEO/Europe-EQEC), Publisher: IEEE
Mejri S, Sow PLT, Kozlova O, et al., 2015, Measuring the Boltzmann constant by mid-infrared laser spectroscopy of ammonia, METROLOGIA, Vol: 52, Pages: S314-S323, ISSN: 0026-1394
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- Citations: 23
Argence B, Chanteau B, Lopez O, et al., 2015, Quantum cascade laser frequency stabilization at the sub-Hz level, NATURE PHOTONICS, Vol: 9, Pages: 456-U57, ISSN: 1749-4885
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- Citations: 114
Argence B, Chanteau B, Lopez O, et al., 2015, Quantum Cascade Laser stabilization at sub-Hz-level by use of a frequency comb and an optical link, Conference on Quantum Sensing and Nanophotonic Devices XII, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
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- Citations: 1
Rohart F, Mejri S, Sow PLT, et al., 2014, Absorption-line-shape recovery beyond the detection-bandwidth limit: Application to the precision spectroscopic measurement of the Boltzmann constant, PHYSICAL REVIEW A, Vol: 90, ISSN: 1050-2947
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- Citations: 19
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