Rapid Frequency-comb Infrared Spectroscopy With Cross-dispersed Spectrometers

Fleisher, Adam J.

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

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

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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