| 用于10mm 微测辐射热计的红外光学天线设计 |
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| 引用本文： | 杨 茜,楼 群,李锡明,伍瑞新.用于10mm 微测辐射热计的红外光学天线设计[J].微波学报,2019,35(3):46-50. |
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| 作者姓名： | 杨 茜 楼 群 李锡明 伍瑞新 |
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| 作者单位： | 南京大学电子科学与工程学院,南京210023 |
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| 基金项目： | 国家自然科学基金(61771237) |
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| 摘 要： | 微测辐射热计利用热敏电阻对温度的敏感特性来实现红外探测,将光学天线场局域的能力应用于微测辐射热计,可以集中入射能量至热敏电阻,提高电阻的温度响应。基于这一思想设计了一种工作在红外波段的改进型蝶形光学天线,其中心场强最高可增强83 倍。采用了多物理分析方法,结合两种常用的热敏材料(铝和氧化钒)对耦合结构的电磁特性和热学特性进行了分析。结果显示,在1000 W/m2 的入射功率密度下,铝温升可达1.85 mK,氧化钒温升0.85 mK,与同类工作相比温度响应增强了数倍。该改进型蝶形光学天线可用于微测辐射热计提升红外探测效率,在高密度红外成像器件应用中发挥作用。
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| 关 键 词： | 红外探测 场局域 光学天线 微测辐射热计 |
Design of Infrared Antenna for 10 mm Micro-bolometer |
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| Affiliation: | School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China |
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| Abstract: | Micro-bolometers make use of the sensitivity of thermistor to temperature to realize infrared detection. By combining field enhancement of optical antenna with micro-bolometer, the incident energy can focus on thermistor and the temperature response of the thermistor will be improved. Based on this idea, we design an improved bow-tie antenna working in the infrared band, which can enhance the electric field by 83 times. A multi-physics simulation is used to analyze the antenna with two kinds of thermistor (aluminum and vanadium oxide). The results show that at an incident power density of 1000 W/ m2 , the temperature rise of Al is 1.85 mK and the temperature rise of VOx is 0.85 mK. The temperature response is several times of other similar work. The improved bow-tie antenna can be used on micro-bolometer to increase the detection
efficiency and play a role in high density imaging device applications. |
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| Keywords: | infrared detection field localization optical antenna micro-bolometer |
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