Figure | Working principle and performance of the suspended waveguide-enhanced photothermal spectroscopy sensor. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure | Working principle and performance of the suspended waveguide-enhanced photothermal spectroscopy sensor.

Caption

Figure | Working principle and performance of the suspended waveguide-enhanced photothermal spectroscopy sensor. a, Schematic of the suspended chalcogenide glass waveguide. The air bottom-cladding enhances light-gas interaction and suppresses thermal dissipation. b, Comparison showing the massive improvement in heat source power and probed temperature change over traditional non-suspended waveguides. c, The sensor achieves a record-breaking noise-equivalent absorption (NEA) of 3.8×10-7cm-1 for acetylene with a large dynamic range.

Credit

Wei Jin et al.

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CC BY

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