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1 August 2021 Transient studies of vibration-cavity polaritons
Jeffrey C. Owrutsky, Andrea B. Grafton, Adam D. Dunkelberger, Blake S Simpkins, Elizabeth S. Ryland
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Proceedings Volume 11799, Physical Chemistry of Semiconductor Materials and Interfaces XX; 1179905 (2021) https://doi.org/10.1117/12.2594303
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
Abstract
Vibration-cavity polaritons, which are produced by strong coupling between an optical cavity and a molecular vibration, can modify chemical reaction rates and branching ratios. However the observed effects are poorly understood. To gain insight into how these polaritons might alter molecular processes, we used ultrafast pump-probe and two-dimensional infrared spectroscopies to characterize polariton excited state dynamics. Our earlier studies on vibration-cavity polaritons with tungsten hexacarbonyl demonstrated that much of the response is due to so-called reservoir or uncoupled excited state absorption as well as polariton contraction. In recent studies, we have used 2D IR and spectrally filtered pump-probe studies on the nitroprusside anion in methanol to determine the transition frequencies and dynamics of polariton excited states allowing us to extract polariton dephasing timescales as well as incoherent polariton population which at a significantly longer timescale.
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Jeffrey C. Owrutsky, Andrea B. Grafton, Adam D. Dunkelberger, Blake S Simpkins, and Elizabeth S. Ryland "Transient studies of vibration-cavity polaritons", Proc. SPIE 11799, Physical Chemistry of Semiconductor Materials and Interfaces XX, 1179905 (1 August 2021); https://doi.org/10.1117/12.2594303
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KEYWORDS
Polaritons
Infrared spectroscopy
Absorption
Infrared radiation
Process control
Quantum electronics
Quantum wells
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