Ultra High Sensitivity Photonic Crystal Fiber Sensor Coated with MoO2 Thin Film
Precious metals such as Au and Ag have shown excellent performance in photonic crystal fibers,but their high cost limits their further development.Therefore,there is an urgent need to develop new surface plasmon polariton materials with low cost and high charge carrier density.This article proposes an inexpensive D-type photonic crystal fiber sensor based on MoO2 nanofilm coating,which achieves sensing and detection of analyte refractive indices ranging from 1.38 to 1.43.And by adjusting the fiber structure parameters,the optimal structure was obtained,achieving ultra-high average sensitivity in the x-polarization direction up to 24000 nm/RIU.This indicates that MoO2 has great potential for application as a plasma sensing material in the field of optical fiber sensing.
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