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- W4286568241 abstract "Photoacoustic spectroscopy (PAS) based gas sensors with high sensitivity, wide dynamic range, low cost, and small footprint are desirable in energy, environment, safety, and public health. However, most works have focused on either acoustic resonator to enhance acoustic wave or optical resonator to enhance optical wave. Herein, we develop a gas sensor based on doubly resonant PAS in which the acoustic and optical waves are simultaneously enhanced using combined optical and acoustic resonators in a centimeter-long configuration. Not only the lower detection limit is enhanced by the double standing waves, but also the upper detection limit is expanded due to the short resonators. As an example, we developed a sensor by detecting acetylene (C2H2), achieving a noise equivalent absorption of 5.7 × 10-13 cm-1 and a dynamic range of eight orders. Compared to the state-of-the-art PAS gas sensors, the developed sensor achieves a record sensitivity and dynamic range." @default.
- W4286568241 created "2022-07-22" @default.
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- W4286568241 date "2022-09-01" @default.
- W4286568241 modified "2023-10-14" @default.
- W4286568241 title "Doubly resonant sub-ppt photoacoustic gas detection with eight decades dynamic range" @default.
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- W4286568241 doi "https://doi.org/10.1016/j.pacs.2022.100387" @default.
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