Rovibrational cooling of molecules by optical pumping
| Autor: | H. Lignier, P. Pillet, Isam Manai, Daniel Comparat, Maria Allegrini, Andrea Fioretti, Ridha Horchani |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Physics
Quantum Physics cold cesium molecules Atomic Physics (physics.atom-ph) Degrees of freedom (physics and chemistry) General Physics and Astronomy FOS: Physical sciences Rotational–vibrational spectroscopy Laser law.invention Physics - Atomic Physics Optical pumping Dark state law Laser cooling Molecule Physics::Atomic Physics Atomic physics Physics::Chemical Physics Ground state Quantum Physics (quant-ph) Optics (physics.optics) Physics - Optics |
| Zdroj: | Physical review letters info:cnr-pdr/source/autori:Manai I. [ 1 ] ; Horchani R. [ 1 ] ; Lignier H. [ 1 ] ; Pillet P. [ 1 ] ; Comparat D. [ 1 ] ; Fioretti A. [ 2,3 ] ; Allegrini M. [ 2,3 ]/titolo:Rovibrational Cooling of Molecules by Optical Pumping/doi:10.1103%2FPhysRevLett.109.183001/rivista:Physical review letters (Print)/anno:2012/pagina_da:183001/pagina_a:183001/intervallo_pagine:183001–183001/volume:109 |
| Popis: | We demonstrate rotational and vibrational cooling of cesium dimers by optical pumping techniques. We use two laser sources exciting all the populated rovibrational states, except a target state that thus behaves like a dark state where molecules pile up thanks to absorption-spontaneous emission cycles. We are able to accumulate photoassociated cold Cs2 molecules in their absolute ground state (v = 0, J = 0) with up to 40% efficiency. Given its simplicity, the method could be extended to other molecules and molecular beams. It also opens up general perspectives in laser cooling the external degrees of freedom of molecules. 4 pages, 5 figures |
| Databáze: | OpenAIRE |
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