Half-broadband two-dimensional electronic spectroscopy with active noise reduction

Bressan, Giovanni ORCID: https://orcid.org/0000-0001-7801-8495, Heisler, Ismael A., Greetham, Gregory M., Edmeades, Amy and Meech, Stephen R. ORCID: https://orcid.org/0000-0001-5561-2782 (2023) Half-broadband two-dimensional electronic spectroscopy with active noise reduction. Optics Express, 31 (25). pp. 42687-42700. ISSN 1094-4087

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Abstract

Two-dimensional electronic spectroscopy (2DES) provides detailed insight into coherent ultrafast molecular dynamics in the condensed phase. Here we report a referenced broadband pump-compressed continuum probe half-broadband (HB) 2DES spectrometer in a partially collinear geometry. To optimize signal-to-noise ratio (SNR) we implement active noise reduction referencing, which has not previously been applied in 2DES. The method is calibrated against the well characterized 2DES response of the oxazine dye cresyl violet and demonstrated at visible wavelengths on the photochromic photoswitch 1,2-Bis(2-methyl-5-phenyl-3-thienyl) perfluorocyclopentene (DAE). The SNR is improved by a factor of ∼2 through active referencing. This is illustrated in an application to resolve a low frequency mode in the excited electronic state of DAE, yielding new data on the reaction coordinate. We show that the active noise reduction referencing, coupled with the rapid data collection, allows the extraction of weak vibronic features, most notably a low frequency mode in the excited electronic state of DAE. Published

Item Type: Article
Additional Information: Data availability: Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request. Funding information: Engineering and Physical Sciences Research Council (EP/J009148/1, EP/J021431/1, EP/V00817X/1).
Uncontrolled Keywords: spectroscopy,physical and theoretical chemistry,atomic and molecular physics, and optics ,/dk/atira/pure/subjectarea/asjc/1600/1607
Faculty \ School: Faculty of Science > School of Chemistry
UEA Research Groups: Faculty of Science > Research Groups > Centre for Photonics and Quantum Science
Faculty of Science > Research Groups > Chemistry of Light and Energy
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Depositing User: LivePure Connector
Date Deposited: 05 Dec 2023 02:36
Last Modified: 03 Jan 2024 03:18
URI: https://ueaeprints.uea.ac.uk/id/eprint/93867
DOI: 10.1364/OE.500017

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