GRK seminar:
Martin Švec

Photon-induced processes at single molecules in SPM nanocavities
Institute of Physics
Czech Academy of Sciences
Praha 6,
Czech Republic

Exploration of isolated chromophores – optically active molecules – often reveals stunningly complex internal dynamics of excitations and transitions between electronic configurations, influenced by coupling to vibrational levels and reorganization of local environments. One of the promising tools for studying the photophysics of individual molecules with nanometer resolution is optical spectroscopy that employs plasmonic, atomically sharp tips in Scanning Probe Microscopy (SPM), which overcomes the fundamental spatial resolution limits of visible and infrared light. This methodology enables measurements that correlate electronic structure and atomic arrangement with various photon spectroscopies – e.g., fluorescence, absorption, and Raman scattering – as a function of applied electric field and measurement geometry. In this lecture, I will present our experiments with photon spectroscopies using SPM, focusing in particular on photon absorption-induced phenomena such as photoluminescence, and photon-induced current generation, through which we achieved a direct visual discrimination among the components of a multiconfigurational state of an open-shell chromophore.

Venue: RUN 0,35