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DOI:
飞控与探测:2021,(2):36-50
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基于光学天线的多光谱窄带热探测器及其应用
谈小超, 易 飞
(华中科技大学 光学与电子信息学院)
Optical Antenna Based Multi-Spectral Narrowband Pyroelectric Detectors and Their Applications
TAN Xiaochao, YI Fei
(School of Optical and Electronic Information, Huazhong University of Science and Technology)
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中文摘要: 在回顾热探测器的工作原理、材料体系和典型应用的基础上,着重介绍了利用光学天线调控热探测器像元的光谱响应、实现多光谱窄带探测的技术路线。首次提出了将基于光学天线的多光谱窄带探测器用于非色散红外光谱法(NDIR)进行多种气体传感的应用场景,以摆脱对窄带滤光片的依赖;针对八种典型的危害性气体(H2S、CH4、CO2、CO、NO、CH2O、NO2、SO2)的特征吸收波长构建了多光谱窄带探测器阵列,并采用NDIR进行了单一气体检测,由实验测得的气体检测下限与商用NDIR气体传感器的检测下限相当;发展了从多个窄带探测器的输出信号组合反推混合气体中各组分浓度的数学模型,并进行了NDIR多组分混合气体实验验证。结合商业案例,分析了超构材料多光谱窄带探测技术在固体、液体、气体等形态的物质成分分析中的实用价值,展望了其在国防军事、工业化工、食品安全及污染检测等领域中的应用前景。
中文关键词: 超构材料;热释电探测器;多光谱探测;窄带探测器;气体传感
Abstract:We first review the working principle, choice of materials and typical applications of pyroelectric detectors, and then discuss the tuning of the photoresponses of pyroelectric detector pixels using optical antennas. We propose a multiplexed non-dispersive infrared(NDIR)gas sensing platform consisting of narrowband infrared detector array as read-out. By integrating optical antenna based plasmonic metamaterial absorbers with pyroelectric detectors at the pixel level, the detectors exhibit spectrally tunable and narrowband photoresponse, circumventing the need for separate bandpass filter arrays. We demonstrate the single gas sensing of H2S、CH4、CO2、CO、NO、CH2O、NO2、SO2,respectively. The measured detection limits of single gas experiments are comparable to commercial NDIR sensors. We also develop a mathematical model and demonstrate the deduction of the concentrations of the target gases in a mixture from the readouts of multiple narrowband detectors. Finally, we examine the capability of the narrowband detector array in the spectroscopic analysis of various solids, liquids and gases, and discuss the applications in security, military, industrial production, chemical engineering, food safety and environmental protection.
keywords: metamaterials; pyroelectric detectors; multi-spectral detection; narrowband detection; gas sensing
文章编号:20210205     中图分类号:TN215; TP384    文献标志码:A
基金项目:国家自然科学基金;国家重点研发计划;华中科技大学基础研究计划基金;华中科技大学研究生创新基金
作者单位
谈小超 华中科技大学 光学与电子信息学院 
易 飞 华中科技大学 光学与电子信息学院 
Author NameAffiliation
TAN Xiaochao School of Optical and Electronic Information, Huazhong University of Science and Technology 
YI Fei School of Optical and Electronic Information, Huazhong University of Science and Technology 
引用文本:
谈小超,易 飞.基于光学天线的多光谱窄带热探测器及其应用[J].飞控与探测,2021,(2):36-50.

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