A. H. M. Iftekharul Ferdous, Benjir Newaz Sathi, Md. Shahareaj Islam, Diponkar Kundu, Twana Mohammed Kak Anwer, Shaik Hasane Ahammad, Md. Amzad Hossain, Mahmoud M. A. Eid, Ahmed Nabih Zaki Rashed
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A Highly Sensitive Terahertz Waveguide Plasmonic Sensor for Ethanol Sensing
This paper proposes and numerically investigates a spider-web-like cladding photonic crystal fiber with a hexagonal hollow core–based ethanol sensor utilizing terahertz (THz) signal. The finite element method (FEM) technique is applied to examine sensing and guiding characteristics of this sensor by using the COMSOL Multiphysics software. The sensor outperformed other ongoing studies by achieving a high relative sensitivity of 97.09% and an incredibly low confinement loss of 3.68?×?10?12?dB/m at the optimal frequency. In addition, the sensor has a large effective area of 6.458?×?10?08 m2 and spot size with a tiny effective material loss of 0.0051?cm?1. This study represents the huge hexagonal core and a set of rectangular air holes in spider-shaped cladding to simplify manufacture. Future applications for identifying ethanol may greatly benefit from its exceptional sensitivity and guiding qualities.
期刊介绍：
Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons.
Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.
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