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12 mai 2022: 1 événement


  • Séminaires Internes

    Jeudi 12 mai 11:00-12:00 - Jean-Claude Vial

    [INTERNE] Back to Spectro, Resonance Energy Transfer revisited

    Résumé : Resonance energy transfer ** is an optical near-field mechanism which effects a transportation of electronic excitation between physically distinct atomic, ionic or molecular components usually assumed to be based on transition electric “dipole-dipole” coupling. The applications of FRET have expanded tremendously in the last 30 years, and the technique has become a staple in many biological and biophysical fields, particularly for fluorescence microscopy. I will present some experimental results obtained by time resolved high spectral resolution optical spectroscopy on well defined rare earth ion couplings. They reveal an ion-ion interaction more efficient than dipole-dipole. The consequences are analysed in various systems where the interaction between rare earth ions is present.
    ** RET is also known as Förster- or fluorescence- resonance energy transfer (FRET) or Resonance excitation transfer or, initially, resonance activation transfer.
    The seminar will be in French with slides in English and Q&A in English

    En savoir plus : Séminaires Internes