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MO: Fachverband Molekülphysik
MO 11: Poster – Polaritonic Effects in Molecular Systems (joint session MO/Q)
MO 11.2: Poster
Tuesday, March 11, 2025, 14:00–16:00, Tent
Vibrational dynamics of individual oscillators under Vibrational Strong Coupling — •Helena Poulose1, Mathis Noell2, Yannik Pfeifer1, Till Stensitzki1, Carsten Henkel2, Wouter Koopman2, and Henrike Müller-Werkmeister1 — 1Institut für Chemie, Universität Potsdam, Germany — 2Institut für Physik und Astronomie, Universität Potsdam, Germany
The novel field of polariton chemistry opens up a way to tune material properties and steer chemical reactions by manipulating quantum light-matter interactions. Fabry-Perot cavities can be constructed to confine electromagnetic field, allowing the light mode to strongly couple with vibrational transitions of molecules, generating quasi light-matter states, characterised by vacuum rabi splitting. However the underlying mechanism behind how it effects the reaction dynamics is not completely understood. Combining Ultrafast nonlinear spectroscopy with Strong coupling could provide insights to how the energy distribution changes when these delocalized hybrid states are formed. Experiments of vibrational dynamics can possibly provide valuable insights into the fundamental mechanisms of polaritons and how polaritons might modulate Chemistry. Here we report on our a) cavity design and characterisation, b) static polariton spectra supported by theory and c) first attempts in performing nonlinear IR and 2DIR spectra of organic compounds, like Benzaldehyde(C=O), under VSC in cavities. We aim to investigate vibrational lifetimes and energy transfer processes and examining how these depend on cavity and molecular properties.
Keywords: Vibrational Strong Coupling; Ultrafast Non-linear spectroscopy; Polariton Chemistry; Nonlinear IR pump-probe spectra