Wu Binmin, Zhang Ziyu, Chen Bingxin, Zheng Zhi, You Chunyu, Liu Chang, Li Xing, Wang Jinlong, Wang Yunqi, Song Enming, Cui Jizhai, An Zhenghua, Huang Gaoshan, Mei Yongfeng
Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai 200438, People's Republic of China.
Yiwu Research Institute of Fudan University, Yiwu, Zhejiang 322000, People's Republic of China.
Sci Adv. 2023 Oct 20;9(42):eadi7805. doi: 10.1126/sciadv.adi7805. Epub 2023 Oct 18.
Uncooled infrared detection based on vanadium dioxide (VO) radiometer is highly demanded in temperature monitoring and security protection. The key to its breakthrough is to fabricate bolometer arrays with great absorbance and excellent thermal insulation using a straightforward procedure. Here, we show a tubular bolometer by one-step rolling VO nanomembranes with enhanced infrared detection. The tubular geometry enhances the thermal insulation, light absorption, and temperature sensitivity of freestanding VO nanomembranes. This tubular VO bolometer exhibits a detectivity of ~2 × 10 cm Hz W in the ultrabroad infrared spectrum, a response time of ~2.0 ms, and a calculated noise-equivalent temperature difference of 64.5 mK. Furthermore, our device presents a workable structural paradigm for polarization-sensitive and omnidirectional light coupling bolometers. The demonstrated overall characteristics suggest that tubular bolometers have the potential to narrow performance and cost gap between photon detectors and thermal detectors with low cost and broad applications.
基于二氧化钒（VO）辐射计的非制冷红外探测在温度监测和安全防护方面有很高的需求。其取得突破的关键在于使用简单的工艺制造出具有高吸收率和优异隔热性能的测辐射热计阵列。在此，我们展示了一种通过一步轧制VO纳米膜制成的管状测辐射热计，其红外探测性能得到了增强。管状结构增强了独立VO纳米膜的隔热性能、光吸收能力和温度灵敏度。这种管状VO测辐射热计在超宽红外光谱中表现出约2×10 cm Hz W的探测率、约2.0 ms的响应时间以及计算得出的64.5 mK的噪声等效温差。此外，我们的器件为偏振敏感和全向光耦合测辐射热计提供了一种可行的结构范例。所展示的整体特性表明，管状测辐射热计有潜力以低成本和广泛应用缩小光子探测器和热探测器之间的性能和成本差距。
