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Remote Sensing with Commutable Monolithic Laser and Detector
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DOI：10.1021/acsphotonics.6b00603.png)
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摘要
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The ubiquitous trend toward miniaturized sensing systems demands novel concepts for compact and versatile spectroscopic tools. Conventional optical sensing setups include a light source, an analyte interaction region, and a separate external detector. We present a compact sensor providing room-temperature operation of monolithic surface-active lasers and detectors integrated on the same chip. The differentiation between emitter and detector is eliminated, which enables mutual commutation. Proof-of-principle gas measurements with a limit of detection below 400 ppm are demonstrated. This concept enables a crucial miniaturization of sensing devices.
Keyword:
quantum cascade laser
quantum cascade detector
sensor
on-chip
monolithic integration
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