High Sensitivity Broadband Transient Absorption Spectroscopy Of Molecular Beams

Silfies, Myles C

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https://hdl.handle.net/2142/111353 Copy

Description

Title

High Sensitivity Broadband Transient Absorption Spectroscopy Of Molecular Beams

Author(s)

Silfies, Myles C

Contributor(s)

• Allison, Thomas K
• Lewis, Neomi
• Kowzan, Grzegorz

Issue Date

2021-06-22

Keyword(s)

Dynamics and kinetics

Abstract

Molecules with ultrafast dynamics inherently have broad spectral features and modeling ultrafast spectroscopy data is a complex art. The complexity is reduced in the gas phase, however most ultrafast spectroscopies are limited to high-density samples such as liquids. By using a frequency comb laser and optical cavities, we present a technique for performing ultrafast optical spectroscopy with high sensitivity, enabling work in dilute gas-phase molecules and clusters\footnote{M. A. R. Reber, Y. Chen, T. K. Allison, Optica 3, 311 (2016)}. This sensitivity enables ultrafast spectroscopy in dilute molecular beams, where cold isolated designer molecules, radicals, and clusters can be produced that do not exist in solution. This new technique enables direct comparisons to well-established ultrafast techniques which can provide additional insight for theoretical models and molecular dynamics. In this talk we will introduce our broadband cavity-enhanced \begin{wrapfigure}{r}{0pt}\includegraphics[scale=0.5]{HAN_isms.eps}\end{wrapfigure} transient absorption spectrometer\footnote{M. C. Silfies, G. Kowzan, N. Lewis, and T. K. Allison, arXiv:2102.04981 (2021)}, which has a UV pump at 355 nm and a probe tunable from 450 to 700 nm, and discuss measurements of chemical dynamics of molecules in seeded molecular beams. Example systems discussed will include proton transfer in 1’-hydroxy 2’-acetonapthone and the effects of argon clustering on the internal conversion of salicylidene aniline.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/111353

DOI

10.15278/isms.2021.TC12

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