Design and Investigation of a High-Sensitivity PCF Sensor for the Detection of Sulfur Dioxide

Abstract

A vertical photonic crystal fiber (V-PCF) and a horizontal PCF (H-PCF) are designed for the detection of sulfur dioxide (SO<inf>2</inf>) in this paper. A demanding numerical investigation is carried out in a wider range of wavelengths from 0.8 to 1 ?m. SO<inf>2</inf> is a major contributor to air pollution, which is responsible for asthma and cancer. The optical parameters are analyzed by using the finite element method (FEM) which consumes a completely circular isotropic perfectly matched layer (PML). The designed V-PCF sensor test is performed with different PML radius values, different elliptical constants for the inner cladding, the outer cladding layer, and the core. The higher relative sensitivity of 59.34% makes this proposed V-PCF a good design for SO<inf>2</inf> detection. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.