研究目的
To present a low-cost fabrication technique for plasmonic fiber-optic based refractive-index sensors using Microsphere Photolithography (MPL) for glucose detection.
研究成果
The paper demonstrates the successful low-cost fabrication of plasmonic fiber-optic based refractive-index sensors using MPL. The sensors showed a sensitivity of 480 RIU and a detection limit of 33 mg/mL for glucose in water, laying the groundwork for future nanophotonic sensor designs on optical fiber.
研究不足
The technique relies on the self-assembly of microspheres, which may introduce disorder in the lattice, potentially affecting the sensor's performance. The detection limit for glucose in water was found to be 33 mg/mL, which may not be sensitive enough for certain applications.
1：Experimental Design and Method Selection:
The MPL technique was used to pattern nanoholes in a thin aluminum film on the cleaved tip of SMF-28 optical fibers to create EOT based sensors.
2：Sample Selection and Data Sources:
The sensors were tested by immersing them in water with different concentrations of glucose.
3：List of Experimental Equipment and Materials:
SMF-28 optical fibers, 1 μm silica microspheres, butanol, Shipley 1805 photoresist, aluminum for sputter coating, Agilent 83437A light source, Ando AQ6317B Optical Spectrum Analyzer (OSA).
4：Experimental Procedures and Operational Workflow:
The fiber was prepared, coated with photoresist, exposed to UV light through microspheres, and the pattern was transferred to the aluminum layer. The reflection spectra were measured in different media.
5：Data Analysis Methods:
The shift in resonant wavelength was measured by recording the reflectance spectra from the fiber using an optical spectrometer.
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