Ultrafast Molecular Spectroscopy Using a Hollow-Core Photonic Crystal Fiber Light Source

We demonstrate, for the first time, the application of rare-gas-filled hollow-core photonic crystal fibers (HC-PCFs) as tunable ultraviolet light sources in femtosecond pump–probe spectroscopy. A critical requirement here is excellent output stability over extended periods of data acquisition, and w...

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Bibliographic Details
Published in:The journal of physical chemistry letters 2019-02, Vol.10 (4), p.715-720
Main Authors: Kotsina, Nikoleta, Belli, Federico, Gao, Shou-fei, Wang, Ying-ying, Wang, Pu, Travers, John C, Townsend, Dave
Format: Article
Language:English
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Summary:We demonstrate, for the first time, the application of rare-gas-filled hollow-core photonic crystal fibers (HC-PCFs) as tunable ultraviolet light sources in femtosecond pump–probe spectroscopy. A critical requirement here is excellent output stability over extended periods of data acquisition, and we show this can be readily achieved. The time-resolved photoelectron imaging technique reveals nonadiabatic dynamical processes operating on three distinct time scales in the styrene molecule following excitation over the 242–258 nm region. These include ultrafast (
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.8b03777