TY - JOUR
AU - Daher, Malek G.
AB - A simple 2D SiC grating based surface Plasmon resonance (SPR) gas sensor operating in thermal infrared wavelengths is proposed for refractive index sensing. The performance of the SPR sensor in terms of quality factor, sensitivity and figure of merit were investigated by applying optical interrogation technique. The rigorous coupled waves analysis (RCWA) is used to analyze the proposed design. By means of numerical examples, the effects of the characteristics of the incident light and geometrical parameters on the behavior of the sensor performance are discussed. The design has been used to sense variations in the index of gases between 1.0 and 1.01. For some optimal parameters, our sensor shows excellent results for the detection of gases. With θ=2∘\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\uptheta =2^\circ$$\end{document} angle of incidence and φ=45∘\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\varphi =45^\circ$$\end{document} conical angle ultra-high average sensitivity of 6561.8nm/RIU\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$6561.8{ }\,{\text{nm}}/{\text{RIU}}$$\end{document} is achieved. Our proposed device shows a sensitivity as high as 7800nm/RIU\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$7800\,{\text{nm}}/{\text{RIU}}$$\end{document}, and a maximum figure of merit of 131.87/RIU\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$131.87/{\text{RIU}}$$\end{document}. This optical gas sensor has a much simpler design and higher sensitivity compared to other sensors reported previously. This is significant because our gas sensor has an important applications e.g. monitoring of combustible and the early detection of fires.
TI - Highly sensitive refractive index gas sensor using two-dimensional silicon carbide grating based on surface plasmon resonance
JF - Optical and Quantum Electronics
DO - 10.1007/s11082-023-04682-3
DA - 2023-05-01
UR - https://www.deepdyve.com/lp/springer-journals/highly-sensitive-refractive-index-gas-sensor-using-two-dimensional-zucFLykvFS
VL - 55
IS - 5
DP - DeepDyve
ER -