激光技术2024，Vol.48Issue(3)：345-351,7.DOI:10.7510/jgjs.issn.1001-3806.2024.03.008
基于光子自旋霍尔效应的甲烷检测理论研究
Theoretical research of methane detection based on photonic spin Hall effect
摘要
Abstract
In order to realize the high precision detection of the volume fraction of methane,the photonic spin Hall effect phenomenon with high-quality factor is excited by a multilayer structure.In an asymmetric arrangement,a methane-sensitive film was introduced into the structure,and the volume fraction of methane could be detected by the change in the refractive index of the sensitive film.The effects of gas porosity,period number,metal thickness,and sensitive film thickness on the photon spin Hall effect were studied,and the transfer matrix method was used for numerical analysis.The results show that the sensor can detect methane gas with volume fraction of 0～3%(refractive index change is 1.4364～1.4478)with a sensitivity of 29.6°.The highest figure of merit and the lowest detection limit are 395 and 0.00012,respectively.The sensor has a simple structure and strong detection ability,which provides a new idea for the research of optical sensors.关键词
传感器技术/甲烷体积分数/甲烷敏感膜/非互易/光子自旋霍尔效应Key words
sensor technique/methane volume fraction/methane sensitive film/non-reciprocity/photonic spin Hall effect分类
信息技术与安全科学引用本文复制引用
侯自如,王哲飞,武永..基于光子自旋霍尔效应的甲烷检测理论研究[J].激光技术,2024,48(3):345-351,7.基金项目
江苏省大学生创新创业训练计划资助项目(202310300079Y) （202310300079Y）
