SKM 2021 – wissenschaftliches Programm

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SYCS: Symposium Multidimensional coherent spectroscopy of functional nanostructures

SYCS 1: Symposium: Multidimensional coherent spectroscopy of functional nanostructures

SYCS 1.3: Hauptvortrag

Dienstag, 28. September 2021, 11:00–11:30, Audimax 1

Exciton Dynamics revealed by Multidimensional Coherent Spectroscopies applied to Light-Harvesting Systems — •Thomas L.C. Jansen — University of Groningen, Zernike Institute for Advanced Materials, Groningen, The Netherlands

Natural light-harvesting systems as found in plants, algae, and especially bacteria are efficient in absorbing photons and transporting their energy to reaction centers, where the energy is converted to chemical energy. Time-resolved multidimensional coherent spectroscopies as Two-Dimensional Electronic Spectroscopy and Fluorescence-Detected Two-Dimensional Electronic Spectroscopy allow the detailed study of the mechanism and dynamics of the underlying light harvesting process. However, these spectra are often challenging to interpret. I will discuss how simulations can be used to distinguish between different processes as energy transport, exciton delocalization, electronic coherence, nuclear coherence, and exciton annihilation. Increasingly detailed models of light-harvesting systems allow increasingly refined understanding of the molecular scale dynamics directing the light-harvesting process. The understanding of what the spectroscopic methods reveal also pave the way for their application in other areas of research on functional nanostructures including organic, inorganic, and hybrid opto-electronic systems. This may aid the design of future artificial light-harvesting systems for photo-voltaic applications or help improving crop yield.