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

[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.

[发布机构] 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

[效力级别] 工业技术

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