Long-wave mid-infrared time-resolved dual-comb spectroscopy of short-lived intermediates
In this Letter, an electro-optic dual-comb spectrometer with a central tunable range of 7.77-8.22 µm is demonstrated to perform transient absorption spectroscopy of the simplest Criegee intermediate ( ), a short-lived species involved in many key atmospheric reactions, and its self-reaction product...
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| Published in | Optics letters Vol. 45; no. 24; p. 6791 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
United States
15.12.2020
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| Online Access | Get more information |
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| Summary: | In this Letter, an electro-optic dual-comb spectrometer with a central tunable range of 7.77-8.22 µm is demonstrated to perform transient absorption spectroscopy of the simplest Criegee intermediate (
), a short-lived species involved in many key atmospheric reactions, and its self-reaction product via comb-mode-resolved spectral sampling at microsecond temporal resolution. By combining with a Herriott-type flash photolysis cell,
can be probed with a detection limit down to ∼1×10
. Moreover, pressure broadening of
absorption lines can be studied with spectrally interleaved dual-comb spectroscopy. This Letter holds promise for high-resolution precision measurements of transient molecules, especially for the study of large molecules in complex systems. |
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| ISSN: | 1539-4794 |
| DOI: | 10.1364/OL.413754 |