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基于埃普西隆近零材料的双层超材料用于选择性中红外辐射

Ju Chen¹, Xianghui Liu¹, Pan Wang¹

¹State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.

|October 26, 2023

概括

这项研究引入了一种用于选择性中红外线 (MIR) 辐射的新型双层元材料,实现了伪装和辐射冷却. 该材料在大气窗口中具有低排放性,在其他地方具有高排放性.

科学领域:

材料科学材料科学材料科学
光学是什么?光学是什么?光学是什么?
纳米技术纳米技术

背景情况:

选择性中红外 (MIR) 辐射对于伪装和热管理等应用至关重要.
通过简单的结构实现同时的MIR伪装和辐射冷却具有重大挑战.

研究的目的:

提出和演示一种用于选择性MIR发射的新型双层元材料.
为了研究MIR选择性发射和辐射冷却的基础物理.

主要方法:

双层元材料的理论和实验研究.
使用添加氧化物 (AZO) 纳米粒子在薄膜上的Al2O3矩阵中的制造.
在不同MIR光谱范围的发射率的表征.

主要成果:

拟议的超材料在MIR伪装和辐射冷却方面表现出高性能.
在大气窗口内达到低发射率 (ε3-5μm=0.11, ε8-14μm=0.20) 和在外面达到高发射率 (ε5-8μm=0.81).
证明了选择性发射的epsilon-near-zero (ENZ) 和局部表面等离子体共振 (LSPR) 模式之间的相互作用.
证实了大角度冲击支持和极化不敏感.

结论:

基于近零埃普西隆 (ENZ) 材料的双层元材料对选择性MIR辐射非常有希望.
开发的超材料为先进的热管理和光学伪装提供了一条途径.
这些发现为下一代MIR设备铺平了道路,这些设备需要定制的光谱发射率.

关键词:

恩兹陶公司的陶.在 MIR 辐射中,MIR 辐射双层的超材料材料.有效的允许性.

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