Un séminaire sera présenté Lundi 29 Avril à 11h en salle de Conférences XLIM sur le campus de la Borie à Limoges par Kotaro HIRAMATSU, actuellement doctorant à l’Université de Tokyo (Japon). La conférence, qui s’intitule « Raman optical activity by coherent Raman scattering », fait l’objet d’une publication de premier plan dans Physical Review Letters (http://prl.aps.org/abstract/PRL/v109/i8/e083901). 

Les spécialistes, tout comme les non spécialistes curieux, sont invités à venir nombreux assister à cette présentation !

We have developed a method to measure Raman optical activity (ROA) by coherent anti-Stokes Raman scattering (CARS-ROA). In CARS-ROA, chirality-induced CARS field, which is originated from the magnetic dipole or the electric quadrupole interactions, is measured. The polarization of the chirality-induced field is perpendicular to the incident polarizations when the incident polarizations (pump and Stokes) are parallel with each other. Therefore, the chirality-induced CARS field is experimentally discriminated from the achiral CARS field by the polarization resolved detection. We have employed self- and active-heterodyne detection in order to achieve the phase sensitive measurements and also to amplify the extremely small chirality-induced CARS field. CARS-ROA opened up a new possibility for the measurements of time-resolved ROA, which can be a powerful tool for investigating the dynamics of chiral molecules during biochemical reactions