材料科学
超材料
窄带
吸收率
吸收(声学)
光电子学
宽带
超材料吸收剂
阻抗匹配
相变
红外线的
谐振器
光学
宽带
电阻抗
复合材料
可调谐超材料
电气工程
凝聚态物理
物理
工程类
反射率
作者
Yi Lian,Yuke Li,Yipan Lou,Zexu Liu,Chang Jiang,Zheng-Da Hu,Jicheng Wang
出处
期刊:Nanomaterials
[Multidisciplinary Digital Publishing Institute]
日期:2023-06-09
卷期号:13 (12): 1829-1829
被引量:9
摘要
In this paper, we demonstrate an adjustable trifunctional absorber that can achieve the conversion of broadband, narrowband and superimposed absorption based on the phase transition material vanadium dioxide (VO2) in the mid-infrared domain. The absorber can achieve the switching of multiple absorption modes by modulating the temperature to regulate the conductivity of VO2. When the VO2 film is adjusted to the metallic state, the absorber serves as a bidirectional perfect absorber with switching capability of wideband and narrowband absorption. The superposed absorptance can be generated while the VO2 layer is converted to the insulating state. Then, we introduced the impedance matching principle to explain the inner mechanism of the absorber. Our designed metamaterial system with a phase transition material is promising for sensing, radiation thermometer and switching devices.
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