Switchable wavelength-selective and diffuse metamaterial absorber/emitter with a phase transition spacer layer
Switchable wavelength-selective and diffuse metamaterial absorber/emitter with a phase transition spacer layer
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DOI：
10.1063/1.4893616
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发表时间：
2014-08-18
影响因子：
4
通讯作者：
Wang, Liping
中科院分区：
文献类型：
--
作者：
Wang, Hao;Yang, Yue;Wang, Liping
我们通过热开启或关闭二氧化钒(VO2)相变时的磁共振激发，数值演示了一种可切换的超材料吸收/发射体。当用绝缘VO2隔离层支撑磁共振激发时，在5微米附近有一个完全的吸收峰。当用使顶部和底部金属结构短路的金属VO2禁用磁共振时，波长选择吸收被关闭。共振波长可以通过不同的几何结构进行调谐，并且可切换的超材料在斜角处表现出扩散行为。这些结果将有助于设计可切换的超材料，用于能源和传感应用的主动控制。(C)2014 AIP出版有限责任公司。
We numerically demonstrate a switchable metamaterial absorber/emitter by thermally turning on or off the excitation of magnetic resonance upon the phase transition of vanadium dioxide (VO2). Perfect absorption peak exists around the wavelength of 5 mu m when the excitation of magnetic resonance is supported with the insulating VO2 spacer layer. The wavelength-selective absorption is switched off when the magnetic resonance is disabled with metallic VO2 that shorts the top and bottom metallic structures. The resonance wavelength can be tuned with different geometry, and the switchable metamaterial exhibits diffuse behaviors at oblique angles. The results would facilitate the design of switchable metamaterials for active control in energy and sensing applications. (C) 2014 AIP Publishing LLC.