Absolute fluorescence and absorption measurements over a dynamic range of 106 with cavity-enhanced laser-induced fluorescence

Sanders, Scott E.; Willis, Oliver R.; Nahler, N. Hendrik; Wrede, Eckart

Abstract

We present a novel spectroscopic technique that exhibits high sensitivity and a large dynamic range for the measurement of absolute absorption coefficients. We perform a simultaneous and correlated laser-induced fluorescence and cavity ring-down measurement of the same sample in a single pulsed laser beam. The combined measurement offers a large dynamic range and a lower limit of detection than either technique on its own. The methodology, dubbed cavity-enhanced laser-induced fluorescence, is developed and rigorously tested against the electronic spectroscopy of 1,4-bis(phenylethynyl)benzene in a molecular beam and density measurements in a cell. We outline how the method can be used to determine absolute quantities, such as sample densities, absorption cross sections, and fluorescence quantum yields, particularly in spatially confined samples.

Citation

Sanders, S. E., Willis, O. R., Nahler, N. H., & Wrede, E. (2018). Absolute fluorescence and absorption measurements over a dynamic range of 106 with cavity-enhanced laser-induced fluorescence. The Journal of Chemical Physics, 149(1), Article 014201. https://doi.org/10.1063/1.5031842

• Journal Article Type: Article
• Acceptance Date: Jun 6, 2018
• Online Publication Date: Jul 2, 2018
• Publication Date: Jul 7, 2018
• Deposit Date: Jul 6, 2018
• Publicly Available Date: Jul 2, 2019
• Journal: Journal of Chemical Physics
• Print ISSN: 0021-9606
• Electronic ISSN: 1089-7690
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 149
• Issue: 1
• Article Number: 014201
• DOI: https://doi.org/10.1063/1.5031842
• Public URL: https://durham-repository.worktribe.com/output/1322067