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Time-resolved electronic sum-frequency generation spectroscopy with fluorescence suppression using optical Kerr gating

Jordan, Caleb J.C.; Verlet, Jan R.R.

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Authors

Caleb J.C. Jordan



Abstract

Excited state dynamics of molecules at interfaces can be studied using second-order non-linear spectroscopic methods such as time-resolved electronic sum-frequency generation (SFG). However, as such measurements inherently generate very small signals, they are often overwhelmed by signals originating from fluorescence. Here, this limitation is overcome by optical Kerr gating of the SFG signal to discriminate against fluorescence. The new approach is demonstrated on the excited state dynamics of malachite green at the water/air interface, in the presence of a highly fluorescent coumarin dye, and on the photo-oxidation of the phenolate anion at the water/air interface. The generality of the use of optical Kerr gating to SFG measurements is discussed.

Citation

Jordan, C. J., & Verlet, J. R. (2021). Time-resolved electronic sum-frequency generation spectroscopy with fluorescence suppression using optical Kerr gating. The Journal of Chemical Physics, 155(16), https://doi.org/10.1063/5.0065460

Journal Article Type Article
Acceptance Date Oct 12, 2021
Online Publication Date Oct 27, 2021
Publication Date Oct 28, 2021
Deposit Date Jan 11, 2022
Publicly Available Date Jan 11, 2022
Journal Journal of Chemical Physics
Print ISSN 0021-9606
Electronic ISSN 1089-7690
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 155
Issue 16
DOI https://doi.org/10.1063/5.0065460

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