Twin Core Photonic Crystal Fiber Plasmonic Refractive Index Sensor

By Alok Kumar Paul, Ajay Krishno Sarkar, Abu Bakar Siddiqur Rahman, Abdul Khaleque. IEEE Sensors Journal, 2018

142 citations recorded by the source corpus.

This paper presents a highly sensitive plasmonic refractive index (RI) sensor on a dual-core photonic crystal fiber (PCF). The performance of the RI sensor is weighed in terms of amplitude sensitivity, wavelength sensitivity, wavelength resolution, and linearity of the resonance wavelength. Numerical result shows that the maximum amplitude sensitivity of 725.8918 RIU<inline-formula> <tex-math notation="LaTeX">$^{-1}$ </tex-math></inline-formula> and 1085 RIU<inline-formula> <tex-math notation="LaTeX">$^{-1}$ </tex-math></inline-formula> are achieved for <inline-formula> <tex-math notation="LaTeX">$x$ </tex-math></inline-formula>- and <inline-formula> <tex-math notation="LaTeX">$y$ </tex-math></inline-formula>-polarization, respectively, by using amplitude interrogation method. In addition, the wavelength interrogation method gives the maximum wavelength sensitivity of around 9000 nm/RIU for both <inline-formula> <tex-math notation="LaTeX">$x$ </tex-math></inline-formula>- and <inline-formula> <tex-math notation="LaTeX">$y$ </tex-math></inline-formula>-polarized modes. Moreover, the maximum wavelength resolution of <inline-formula> <tex-math notation="LaTeX">$1.11\times 10^{-5}$ </tex-math></inline-formula> RIU and the value of the co-efficient of determination (<inline-formula> <tex-math notation="LaTeX">$\text{R}^{2}$ </tex-math></inline-formula>) of 0.9784 are reported. The proposed high-performance plasmonic RI sensor can be a favorable candidate for the detection of biological and biochemical analytes.

Subfields: Electrical and Electronic Engineering

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