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Sub-parts-per-trillion level sensitivity in trace gas detection by cantilever-enhanced photo-acoustic spectroscopy
Open accessAbstract
An exceptional property of photo-acoustic spectroscopy is the zero-background in wavelength modulation configuration while the signal varies linearly as a function of absorbed laser power. Here, we make use of this property by combining a highly sensitive cantilever-enhanced photo-acoustic detector, a particularly stable high-power narrow-linewidth mid-infrared continuous-wave optical parametric oscillator, and a strong absorption cross-section of hydrogen fluoride to demonstrate the ability of cantilever-enhanced photo-acoustic spectroscopy to reach sub-parts-per-trillion level sensitivity in trace gas detection. The high stability of the experimental setup allows long averaging times. A noise equivalent concentration of 650 parts-per-quadrillion is reached in 32 minutes.
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The HITRAN2016 molecular spectroscopic database
Gordon, I. E., Rothman, L. S., Hill, C., Kochanov, R. V., Tan, Y., Bernath, P. F., Birk, M., Boudon, V., Campargue, A., Chance, K. V., et al. (2017) · Journal of Quantitative Spectroscopy and Radiative Transfer · doi:10.1016/j.jqsrt.2017.06.038 · Cited by 7,721
The HITRAN2012 molecular spectroscopic database
Rothman, L. S., Gordon, I. E., Babikov, Y., Barbe, A., Chris Benner, D., Bernath, P. F., Birk, M., Bizzocchi, L., Boudon, V., Brown, L. R., et al. (2013) · Journal of Quantitative Spectroscopy and Radiative Transfer · doi:10.1016/j.jqsrt.2013.07.002 · Cited by 3,255
Cited by
Qiao, S., He, Y., Sun, H., Patimisco, P., Sampaolo, A., Spagnolo, V., & Ma, Y. (2024) · Light: Science & Applications · doi:10.1038/s41377-024-01459-5 · Cited by 325
Metadata
- Authors
- Tomberg, T., Vainio, M., Hieta, T., & Halonen, L.
- Venue
- Scientific Reports
- Published
- 2018-01-30
- Volume
- 8
- Issue
- 1
- Pages
- 1848-1848
- ISSN
- 2045-2322 (ISSN-L)
- OpenAlex
- W2793298712
- Cited by
- 171
- References
- 2
- FWCI
- 8.53
- Type
- journal article
- Language
- en
- Open access
- gold
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- Tomberg, T., Vainio, M., Hieta, T., & Halonen, L. (2018). Sub-parts-per-trillion level sensitivity in trace gas detection by cantilever-enhanced photo-acoustic spectroscopy. Scientific Reports. https://doi.org/10.1038/s41598-018-20087-9
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