Optimized nanobeam cavities with fins achieve Q-factors up to 70,000 and outcoupling efficiencies above 90%, with fabricated passive InP devices reaching record Q-factors of 170,000 without fins.
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Up-conversion detection converts mid-IR CO absorption to visible band for cavity-free in-situ sensing, reaching 79.6 ppb sensitivity over 0.14 m path with silicon detector and single-photon level detection via SPAD.
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Nanobeam Laser Cavities with High Quality-factor and Near-Unity Outcoupling Efficiency
Optimized nanobeam cavities with fins achieve Q-factors up to 70,000 and outcoupling efficiencies above 90%, with fabricated passive InP devices reaching record Q-factors of 170,000 without fins.
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Mid-infrared high-sensitive cavity-free in-situ CO gas sensing based on up-conversion detection
Up-conversion detection converts mid-IR CO absorption to visible band for cavity-free in-situ sensing, reaching 79.6 ppb sensitivity over 0.14 m path with silicon detector and single-photon level detection via SPAD.