Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 29: Poster – Polaritonic Effects in Molecular Systems (joint session MO/Q)
Q 29.5: Poster
Tuesday, March 11, 2025, 14:00–16:00, Tent
Modifying Photoacids under Vibrational Strong Coupling — •Swathi Swaminathan1, Julia Berger2, Gregor Jung2, and Thomas Ebbesen1 — 1University of Strasbourg, Strasbourg, France — 2Saarland University, Saarbrücken, Germany
Vibrational strong coupling (VSC) between molecular transitions and cavity modes can significantly alter molecular properties and intermolecular interactions in the ground state. Here we explore the properties of photoacids,[1] which exhibit acidity in the excited state, and provide an ideal platform to explore the effects of VSC on their photophysics. Photoacids typically exhibit characteristic fluorescence properties associated with the proton transfer from the solute to the solvent. Under cooperative VSC, we observe that this behavior is modified. This study shows that VSC can also affect excited-state properties, opening new avenues for understanding and controlling light-induced processes in molecular systems under strong coupling conditions.
[1] B. Finkler et al., Photochem. Photobiol. Sci. 2016, 15, 1544.
Keywords: strong coupling; light-matter interaction; cavity; polaritons; vibrations