Issue 16, 2021

Broadband cavity-enhanced ultrafast spectroscopy

Abstract

Broadband ultrafast optical spectroscopy methods, such as transient absorption spectroscopy and 2D spectroscopy, are widely used to study molecular dynamics. However, these techniques are typically restricted to optically thick samples, such as solids and liquid solutions. In this article we discuss a cavity-enhanced ultrafast transient absorption spectrometer covering almost the entire visible range with a detection limit of ΔOD < 1 × 10−9, extending broadband all-optical ultrafast spectroscopy techniques to dilute beams of gas-phase molecules and clusters. We describe the technical innovations behind the spectrometer and present transient absorption data on two archetypical molecular systems for excited-state intramolecular proton transfer, 1′-hydroxy-2′-acetonapthone and salicylideneaniline, under jet-cooled and Ar cluster conditions.

Graphical abstract: Broadband cavity-enhanced ultrafast spectroscopy

Article information

Article type
Paper
Submitted
09 Feb 2021
Accepted
10 Apr 2021
First published
13 Apr 2021

Phys. Chem. Chem. Phys., 2021,23, 9743-9752

Broadband cavity-enhanced ultrafast spectroscopy

M. C. Silfies, G. Kowzan, N. Lewis and T. K. Allison, Phys. Chem. Chem. Phys., 2021, 23, 9743 DOI: 10.1039/D1CP00631B

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