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

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

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
• Public URL: https://durham-repository.worktribe.com/output/1218950