University of Illinois Urbana-Champaign

High Sensitivity Broadband Transient Absorption Spectroscopy Of Molecular Beams

Silfies, Myles C

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5571.pdf
TC12_5571.pdf

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

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
Date of Ingest
  • 2021-09-24T21:09:35Z
  • 2022-01-21T16:09:30Z
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
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/111353
DOI
10.15278/isms.2021.TC12

Owning Collections

Abstracts & Presentations - 2021 International Symposium on Molecular Spectroscopy PRIMARY