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The LCAR (Laboratoire Collisions-Agrégats-Réactivité) is a laboratory centered in fundamental physics organized around two main fields

  1. The study of laser-matter interaction focuses on matter waves studies and strong-field physics
  2. The study of molecular structures and dynamics develops the study and measurement of the properties of clusters, molecules of biological interest, and nano-objects in their environment

Research teams in the lab

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[hal-02904427] The sonorous beat of optical waves in a Michelson interferometer  (28/07/2020)   Moins
This paper describes time-dependent phase modulation experiments using an optical Michelson interferometer. Changes in the path length of the interferometer arms induce phase shifts in time and, thanks to a loudspeaker, make the interferometric signal audible. We produce time-fluctuating refractive indices and mechanical motions of one reflecting mirror. A sinusoidal motion is applied, thus creating a phase modulation of the wave in one of the interferometer arms. Sidebands of the laser frequency appear, which interfere with the other interferometer wave. Our hearing sense is quite developed, and we use it to analyze the non-linear character by the acoustic timbre. Finally, we transfer information by phase modulation. Our setup benefits the visually impaired community as temporal phase changes can be analyzed by the auditory sense, but this unconventional use of an optical interferometer is also attractive to a general audience.

[hal-02895475] Accuracy of neural networks for the simulation of chaotic dynamics: precision of training data vs precision of the algorithm  (16/07/2020)   Plus
[hal-02881940] Fragmentation dynamics of Ar4He1000 upon electron impact ionization: competition between ion ejection and trapping  (09/07/2020)   Plus
[hal-02481944] Spontaneous emission and energy shifts of a Rydberg rubidium atom close to an optical nanofiber  (11/06/2020)   Plus
[hal-02569354] Un rêve pour les filles et les garçons : la science  (15/05/2020)   Plus