Sensitivity analysis of steering-wheel gas sensor against diverse core air hole sizes and core materials in terahertz wave band

14th International Conference on Science, Engineering and Technology

自然科学;工业技术

Ramachandran, A.^1 ; Ramesh Babu, P.^2 ; Senthilnathan, K.^2

School of Electronics Engineering, VIT University, Vellore, Tamil Nadu

632014, India^1

Department of Physics, School of Advanced Sciences, VIT University, Vellore, Tamil Nadu

632014, India^2

关键词: Air holes;    Chemical and biologicals;    Core material;    Full-vectorial finite element methods;    Non-circular;    Operating frequency;    Relative sensitivity;    Steering wheel;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/263/5/052036/pdf
DOI  :  10.1088/1757-899X/263/5/052036

来源: IOP

【 摘 要 】

We design a photonic crystal fiber (PCF) based gas sensor, which works based on evanescent field, by introducing a steering-wheel shape of large noncircular air-hole structure in the cladding region. Further, using the full-vectorial finite element method (FEM), we compute the relative sensitivities of the proposed sensor as 83% and 91% when the operating frequencies are 1THz and 0.5THz, respectively. The proposed sensor is suitable for detecting any kind of chemical and biological gases.