Suspended Waveguide Chip Sniffs Gases at Parts-per-Billion Levels
Air-clad photonic design boosts light-gas interaction and heat retention for ultra-sensitive on-chip sensing
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A redesigned photonic chip enhances gas detection sensitivity to parts-per-billion levels by using air instead of a solid substrate.
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The new design achieves a 45-fold increase in sensing efficiency through improved light interaction with surrounding gases.
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Photothermal spectroscopy allows the chip to detect acetylene at concentrations as low as 330 ppb, setting a new benchmark.
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The compact chip measures 1.2 cm long and delivers results in under a second, making it suitable for rapid detection.
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The technology's compatibility with near-infrared and mid-infrared light enables applications in environmental monitoring and health diagnostics.
