
1.State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
2.Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China
3.Institute of Advanced Technology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, China
Qiang Li (qiangli@zju.edu.cn)
Published:2020,
Published Online:14 April 2020,
Received:08 February 2020,
Revised:20 March 2020,
Accepted:23 March 2020
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Zhu, H. Z. et al. High-temperature infrared camouflage with efficient thermal management. Light: Science & Applications, 9, 627-634 (2020).
Zhu, H. Z. et al. High-temperature infrared camouflage with efficient thermal management. Light: Science & Applications, 9, 627-634 (2020). DOI: 10.1038/s41377-020-0300-5.
High-temperature infrared (IR) camouflage is crucial to the effective concealment of high-temperature objects but remains a challenging issue
as the thermal radiation of an object is proportional to the fourth power of temperature (
T
4
). Here
we experimentally demonstrate high-temperature IR camouflage with efficient thermal management. By combining a silica aerogel for thermal insulation and a Ge/ZnS multilayer wavelength-selective emitter for simultaneous radiative cooling (high emittance in the 5-8 μm non-atmospheric window) and IR camouflage (low emittance in the 8-14 μm atmospheric window)
the surface temperature of an object is reduced from 873 to 410 K. The IR camouflage is demonstrated by indoor/outdoor (with/without earthshine) radiation temperatures of 310/248 K for an object at 873/623 K and a 78% reduction in with-earthshine lock-on range. This scheme may introduce opportunities for high-temperature thermal management and infrared signal processing.
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