Conference Agenda

We present a novel numerical and symmetry-based procedure for constructing an ab initio effective rotation-vibration model as an alternative to perturbation theory. This approach provides new insights into the analysis of infrared spectra of semirigid molecules such as H2CO, CHF3 or CH3CN. The case of nonrigid molecules will also be discussed.

Nous étudions l’alignement impulsionnel de l’acétylène par excitation vibrationnelle résonante. L’excitation du mode ν3 à 3 µm produit un alignement planaire marqué, tandis que la bande ν1+ν3 à 1,5 µm est dominée par des effets non résonants, confirmé expérimentalement.

In this work, we exploit the quantum correlations of Stokes and antiStokes photon pairs to enhance spontaneous Raman spectroscopy, an inherently weak process based on inelastic scattering with high background levels. We illustrate the potential of these correlations for noise-suppressed Raman spectroscopy and vibrational lifetime measurements.

We study the generation of isolated attosecond pulses via polarization gating. We use 7 fs pulses with random carrier envelop phase. We identify cases where the XUV emission is efficient only when isolated attosecond pulses are emitted and observe continuous XUV spectra compatible with the emission of isolated attosecond pulses.

Nous avons étudié un complexe photochrome négative rouge rapide basé sur un complexe de transfert de charge entre la flavine dans l’enzyme sarcosine oxydase monomérique et des inhibiteurs. Par absorption transitoire multi-échelle et fluorescence femtoseconde, nous avons caractérisé la photoréponse de ces complexes et des variants fluorescents.