Highly sensitive tri-path photonic crystal fiber plasmonic sensor based on hybrid layer of gold/platinum diselenide

摘要

Platinum Diselenide, PtSe_2 is becoming highly trending owing to its fascinating optoelectronic, thermoelectric and semiconductor properties. They are non-toxic, chemically inert and allow high biomolecule absorption which makes them highly applicable in sensors to boost the sensing performance. Here, we propose Surface Plasmon Resonance (SPR) based Photonic Crystal Fiber (PCF) sensor for enhanced refractive index sensing at mid infrared wavelengths. In order to achieve this, tri-path PCF coated with hybrid layer of gold/PtSe_2 which allows light to travel freely through the cladding and interact with the plasmonic material to create strong coupling effect. Finite Element Method is used for numerical examination and investigation of the sensing performance for the designed tri-path sensor. The optimized proposed sensor exhibits maximum wavelength sensitivity of 42,000 lira/ RIU and maximum wavelength resolution of 2.4×10~(-6) within the analyte range from 1.33 to 1.38, which can be excellent detection of unknown chemical, biochemical and biological analytes. Further, we achieve very low loss and unique design to accomplish high sensitivity which makes it applicable to be a future candidate in various sensing applications.