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Accueil > EN > Research Areas > Pure and applied spectroscopy > Microwave and (sub)millimeter-wave spectroscopy

Microwave and (sub)millimeter-wave spectroscopy

par Florin-Lucian CONSTANTIN, François ROHART, Georges WLODARCZAK, Laurent MARGULES, Manuel GOUBET, Pascal DREAN, Roman MOTIENKO, Stéphane BAILLEUX, Thérèse HUET - publié le , mis à jour le

The team is specialized in the spectroscopic analysis of molecular systems around 5 major topics :

  • The observation and the characterization of the centimeter-, millimeter- and submillimeter-wave signatures of astrophysical and pre-biotic molecules (mainly organic molecules of masses lower than 500 mau containing CH3, OH or NH2 groups) and radicals (isotopic species of NH, NH2 and HNC). These molecules are among the new targets of the observations of the radio telescopes Herschel (space observatory), ALMA (Atacama Large Millimeter Array) and SOFIA (Stratospheric Observatory for Infrared Astronomy). Preliminary data resulting from laboratory measurements are mandatory for a radioastronomic detection of these species.
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  • The spectroscopic study of atmospherically relevant compounds, such as monoterpens, within the Labex CaPPA. Signatures of such molecules can be detected, identified and quantified by observers such as IASI (Infrared Atmospheric Sounding Interferometer) on board of the MetOp-A platform, MIPAS and ACE-FTS. The preliminary analysis in laboratory is mandatory for an unambiguous identification of complex molecules such as biogenic volatile organic compounds biogenic (BVOCs) and their products of oxidation and degradation.
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  • The study of the lineshapes aiming at meeting the needs for atmospheric physics. It consists in the measurement of collisional broadening and the variations with the traditional Voigt profile of rotational lines of atmospherically relevant molecules. In addition, it is possible to determine the Boltzmann constant via the measurement of the Doppler broadening of a molecular line.
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  • The determination of accurate equilibrium structures of molecules, by combining quantum chemistry calculations and spectroscopy. The microwave spectroscopy of jet-cooled samples, supported by quantum chemistry calculations, is a method of choice giving access to the structure, the conformational landscape of complex molecular systems and the parity non-conservation in molecular systems.
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  • Optoelectronic approach for THz spectroscopy. A LTG-GaAs photoconductive antenna has been developed. It gives access to, for example, the variation of mass ratio between the electron and the proton.
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Team Members

ResearchersPhD/Post-DocFormer members
Stéphane BAILLEUX (MCF) Sabath BTEICH Juan Ramon AVILES MORENO (Post-Doc)
Florin Lucian CONSTANTIN (CR) Elias NEEMAN Jean DEMAISON (DR)
Pascal DREAN (MCF) Elena ZAKHARENKO Imane HAYKAL (Doc)
Manuel GOUBET (MCF) Bernard LEMOINE (CR)
Thérèse HUET (PR)
Laurent MARGULES (PR)
Roman MOTIENKO (MCF)
François ROHART (PR emeritus)
Georges WLODARCZAK (PR)

French Collaborations

CollaboratorsLaboratoryInstitution
P. Asselin, P. Soulard, D. Jacquemart, N. Lacome LADIR Paris VI
L. Coudert, I. Kleiner, A. Perrin, H. Tran, J.-M. Hartmann LISA Paris VII et XII
équipe C. Chardonnet LPL Paris XIII
C. Ceccarelli, A. Faure LAOG Grenoble 1
D. Despois LAB Bordeaux 1
R. Georges IPR Rennes 1
J.-C. Guillemin ENSC Rennes 1
O. Pirali, P. Roy AILES RS SOLEIL
J. Buldyreva UTINAM Besançon
J.-P. Bouanich ISMO Paris XI
A. Cuisset, F. Hindle, G. Mouret LPCA ULCO

International Collaborations

CollaboratorsInstitutionCountry
J. Cernicharo CSIC Madrid Spain
G. Cazzoli, L. Dore, C. Puzzarini Universita di Bologna Italy
J. Vander Auwera Université Libre de Bruxelles Belgium
H. Ozeki Tokyo Institute of Technology Japan
Z. Kisiel Polish Academy of Sciences Poland
E. Alekseev, V. Ilyushin Institute of Radio Astromony of NASU Ukrain
A. Predoi-Cross University of Lethbridge Canada
L. Gianfrani Universita di Napoli Italy
M. A. Koshelev, M. Y. Tretyakov Russian Academy of Sciences Russia