期刊
COMMUNICATIONS PHYSICS
卷 3, 期 1, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s42005-020-00420-3
关键词
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资金
- JST PRESTO [JPMJPR17G2]
- JSPS KAKENHI [17H04852, 17K19071]
- Research Foundation for Opto-Science and Technology
- Murata Science Foundation
- Grants-in-Aid for Scientific Research [17K19071, 17H04852] Funding Source: KAKEN
Improving the spectral acquisition rate of broadband mid-infrared spectroscopy promises further advancements of molecular science and technology. Unlike pump-probe spectroscopy, which requires repeated measurements with different pump-probe delays, continuous spectroscopy running at a high spectral acquisition rate enables transient measurements of fast non-repeating phenomena or statistical analysis of a large amount of spectral data. Recently, Fourier-transform infrared spectrometers with rapid delay scan mechanisms including dual-comb spectrometers have significantly improved the measurement rate up to similar to 1 MSpectra s(-1) that is fundamentally limited by the signal-to-noise ratio. Here, we overcome the limit and demonstrate the fastest continuous broadband mid-infrared spectrometer running at 80 MSpectra s(-1) by implementing a wavelength-swept time-stretch spectroscopy technique. Our proof-of-concept experiment demonstrates broadband absorption spectroscopy of phenylacetylene from 4.4 to 4.9 mu m (2040-2270 cm(-1)) at a resolution of 15 nm (7.7 cm(-1)) with a signal-to-noise ratio of 85 without averaging and a shot-to-shot fluctuation of 1.3%.
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