Open AccessBroadband single-shot transient absorption spectroscopy
Author(s) -
Kelly S. Wilson,
Ashley N. Mapile,
C. Wong
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.390938
Subject(s) - optics , ultrafast laser spectroscopy , materials science , transient (computer programming) , spectroscopy , absorption (acoustics) , absorption spectroscopy , excitation , time resolved spectroscopy , broadband , laser , physics , fluorescence , quantum mechanics , computer science , operating system
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.