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- W4328103800 abstract "Mid-infrared (Mid-IR) silicon photonics has attracted great attention for its promising potential in developing chip-integrated molecular sensors. With the merits of high-quality factors, excellent fabrication reproducibility, and compact device footprints, microring resonators (MRRs) are useful silicon photonic devices for sensing. However, expensive and bulky mid-IR facilities, namely, tunable lasers or spectrometers, may limit applications of MRR-based sensing devices. Here, we theoretically study an MRR-based nitrogen dioxide gas sensor probing with a monochromatic mid-IR laser to conquer this limitation. Moreover, graphene is used as a sensitizing medium by changing the phase of the propagating light in the silicon waveguide after gas molecules adsorption. Specifically, we theoretically realized a sensitivity of 1.259 × 10−5 RIU/ppm, a limit of detection of 5.1 ppm, and a detection range of 5135 ppm based on the proposed sensor. Our study is expected to open a door to the development of chip-integrated, low-cost, high-sensitivity optical gas sensors." @default.
- W4328103800 created "2023-03-22" @default.
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- W4328103800 date "2023-06-01" @default.
- W4328103800 modified "2023-10-12" @default.
- W4328103800 title "Graphene-sensitized microring gas sensor probing with a single-wavelength laser" @default.
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- W4328103800 doi "https://doi.org/10.1016/j.optcom.2023.129447" @default.
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