University of Illinois Urbana-Champaign

Rapid Frequency-comb Infrared Spectroscopy With Cross-dispersed Spectrometers

Fleisher, Adam J.

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TH05_1.pptx
6253.pdf

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https://hdl.handle.net/2142/116724

Description

Title
Rapid Frequency-comb Infrared Spectroscopy With Cross-dispersed Spectrometers
Author(s)
Fleisher, Adam J.
Contributor(s)
  • Hodges, Joseph T.
  • Bailey, D. Michelle
Issue Date
2022-06-21
Keyword(s)
Mini-symposium: Spectroscopy meets Chemical Dynamics
Abstract
Time-resolved spectroscopy with optical frequency combs combines rapid acquisition with high sensitivity, broad bandwidth, and high resolution.\footnote{A. J. Fleisher, B. J. Bjork, T. Q. Bui, K. C. Cossel, M. Okumura, J. Ye, {\it{J. Phys. Chem. Lett.}} {\bf{5,}} 2241--2246 (2014)} This presents an opportunity to study chemistry on a microsecond timescale with molecular specificity and multiplexing. Here we introduce two cross-dispersed frequency comb spectrometers operating in two wavelength regions of the infrared: one from 1.5 $\mu$m to 1.7 $\mu$m and another from 4.4 $\mu$m to 4.7 $\mu$m. In the latter mid-infrared region, we resolve the ro-vibrational lines of several isotopocules of nitrous oxide (N$_{2}$O), demonstrating a spectrometer-limited resolution of 725 MHz.\footnote{D. M. Bailey, G. Zhao, A. J. Fleisher, {\it{Anal. Chem.}} {\bf{92,}} 13759--13766 (2020)} Improvements in spectrometer design, beginning in the former near-infrared region, allow for individual frequency-comb teeth to be resolved. Applied in combination with fast-frame-rate camera technology and emerging solid-state or frequency-agile comb sources, the result is a high-throughput spectroscopic technique that is well-suited for investigating the dynamic chemistry of individual events.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Handle URL
https://hdl.handle.net/2142/116724
DOI
https://doi.org/10.15278/isms.2022.TH05
Copyright and License Information
Copyright 2022 held by the authors

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Abstracts & Presentations - 2022 International Symposium on Molecular Spectroscopy PRIMARY