Md. Arafat Rahman¹, Tanvir Ahmed¹, Md. Ismail Haque², Md. Shamim Anower¹

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¹ Department of Electrical and Electronic Engineering, Rajshahi University of Engineering and Technology, Rajshahi, Bangladesh.
² Department of Electrical and Electronic Engineering, International Islamic University Chittagong, Chittagong, Bangladesh.
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Abstract: Surface plasmon resonance (SPR) sensors have grown in popularity owing to their sensitivity, precision, and capacity for a variety of applications, including detection, monitoring, and sensing, among others. Sensitivity and resolution are two areas where this technology has room for development. A plasmonic biosensor based on an asymmetric slotted PCF structure with extremely high sensitivity has been described and theoretically investigated. This high performance sensor is constructed and completely characterized using finite element method in COMSOL Multiphysics software environment. Sensitivity and resolution are analyzed as performance parameters for the proposed sensor. Numerical simulation exhibits the maximum wavelength-sensitivity of 1100 nm/RIU with 9.09 × 10^-6 RIU resolution in the broad measurement range of refractive index from 1.30 to 1.44. A polarization controller can be used to fine-tune this extremely sensitive and wide-ranging refractive index sensor to fulfil a variety of practical needs. This is performed with the consideration of the variation in the refractive index (RI) of the analyte channels. In comparison with earlier PCF-based sensors, the fiber design structure is basic, symmetrical, simple to produce, and cost-effective. Because of the asymmetric air holes and higher sensitivities of the refractive index detector, it is possible to identify biomolecules, biochemicals and other analytes.

Keywords: Surface Plasmon Resonance (SPR) Sensor, High Sensitivity, Photonic Crystal Fiber (PCF), Optical Fiber Sensor

Cite this paper: Rahman, M. , Ahmed, T. , Haque, M. and Anower, M. (2022) A Photonic Crystal Fiber Based Asymmetric Slotted Structured Highly Sensitive Refractive Index Plasmonic Biosensor. Journal of Sensor Technology, 12, 1-17. doi: 10.4236/jst.2022.121001.

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