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 x 10(-12) dB/m at the optimal frequency. In addition, the sensor has a large effective area of 6.458 x 10(-08) m(2) 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.

Automated summary

This paper proposes a spider-web-like cladding photonic crystal fiber with a hexagonal hollow core-based ethanol sensor utilizing terahertz (THz) signal. The sensor achieved a high relative sensitivity of 97.09% and a low confinement loss of 3.68 x 10(-12) dB/m at the optimal frequency, outperforming other studies. It has a large effective area of 6.458 x 10(-08) m(2) and a tiny effective material loss of 0.0051 cm(-1). This study simplifies the manufacture process by using a huge hexagonal core and a set of rectangular air holes in spider-shaped cladding. Future applications for identifying ethanol can greatly benefit from its exceptional sensitivity and guiding qualities.