Widely tunable UV/VIS cavity-enhanced ultrafast spectroscopy and excited state proton transfer in jet-cooled molecules and clusters
Chen, Yuning
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https://hdl.handle.net/2142/100625
Description
Title
Widely tunable UV/VIS cavity-enhanced ultrafast spectroscopy and excited state proton transfer in jet-cooled molecules and clusters
Author(s)
Chen, Yuning
Contributor(s)
Allison, Thomas K.
Silfies, Myles C
Issue Date
2018-06-19
Keyword(s)
Mini-symposium: Frequency-Comb Spectroscopy
Date of Ingest
2018-08-17T16:09:22Z
2018-12-12T22:38:46Z
Abstract
Ultrafast optical spectroscopy methods, such as transient absorption spectroscopy and 2D spectroscopy, are typically restricted to optically thick samples, such as solids and liquid solutions. We have developed a technique, Cavity-Enhanced Ultrafast Spectroscopy, to study dynamics in a molecular beam with femtosecond temporal resolution. By coupling frequency combs into optical cavities, we previously demonstrated ultrafast transient absorption measurements with a detection limit of ∆OD = 2 × 10−10(10−9/ √ Hz). a In this talk, I will present a widely tunable version of this spectrometer operating at probe wavelengths between 450 and 700 nm (8000 cm−1 ) using only one set of dispersion managed cavity mirrors. The tunable probe comb is generated using an intracavity doubled optical parametric oscillator. I will discuss the technical details of this spectrometer and its application to the dynamics of excited state intramolecular proton transfer (ESIPT) in jet-cooled molecules and clusters.
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