Broadband single-shot transient absorption spectroscopy

The duration of transient absorption spectroscopy measurements typically limits the types of systems for which the excited state dynamics can be measured. We present a single-shot transient absorption (SSTA) instrument with a spatially encoded 60 ps time delay range and a 100 nm spectral range that...

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Bibliographic Details
Published inOptics express Vol. 28; no. 8; pp. 11339 - 11355
Main Authors Wilson, Kelly S, Mapile, Ashley N, Wong, Cathy Y
Format Journal Article
LanguageEnglish
Published United States 13.04.2020
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Summary:The duration of transient absorption spectroscopy measurements typically limits the types of systems for which the excited state dynamics can be measured. We present a single-shot transient absorption (SSTA) instrument with a spatially encoded 60 ps time delay range and a 100 nm spectral range that is capable of acquiring a transient spectrum in 20 s. We describe methods to spatially overlap the flat-top pump and probe beams at the sample plane, calibrate the spatially encoded time delay, and correct for non-uniform excitation density. SSTA measurements of organic materials in solution and film demonstrate this technique.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.390938