Hybrid Plasmonic Waveguide Based Platform for Refractive Index and Temperature Sensing
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Date
2022
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Publisher
Institute of Electrical and Electronics Engineers Inc.
Abstract
A nanoscale 3D hybrid plasmonic waveguide (HPWG) refractive index-cum-temperature sensor has been proposed and simulated in this work. The aqueous analyte (benzene C6H6) sensing is possible over the wavelength range from 1.18∼μ m to 2.2∼μ m. A well-known refractive index (RI) sensing method (or wavelength interrogation) is considered for the proposed Si-TiO2-SiO2-Au nanostructure. The sensor design includes, titanium dioxide (TiO2) layer deposited over the silicon dioxide to enhance the overall sensitivity of the HPWG sensor. The finite element method (FEM) based 3D-numerical simulations are performed for an IR band signal, predicting 1022.75 nm/RIU device sensitivity and 2.95 nm/°C temperature sensitivity. The proposed sensor is suitable for next-generation on-chip biochemical sensing applications with nanoscale dimensions, low cost, and high sensitivity. © 1989-2012 IEEE.
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Keywords
Finite element method, Gold, Integrated optics, Nanophotonics, Nanosensors, Numerical methods, Optical sensors, Optical waveguides, Plasmonics, Refractive index, Silica, Silicon, Silicon oxides, Temperature sensors, Titanium dioxide, Analytes, Finite element analyse, Hybrid plasmonic waveguides, Nano scale, Refractive index sensing, Sensitivity, Surface-plasmon, Temperature sensing, Wavelength ranges, Surface plasmons
Citation
IEEE Photonics Technology Letters, 2022, 34, 18, pp. 953-956