Zhang Jingyu, Liu Chang, Feng Hengli, Fang Dongchao, Wang Jincheng, Zhang Zuoxin, Gao Yachen, Gao Yang
School of Electronic Engineering, Heilongjiang University, Harbin 150080, China.
Heilongjiang Provincial Key Laboratory of Metamaterials Physics and Device, Heilongjiang University, Harbin 150080, China.
Nanomaterials (Basel). 2022 Sep 22;12(19):3300. doi: 10.3390/nano12193300.
In this paper, we propose a dual-channel mid-infrared toroidal metasurface that consists of split equilateral triangular rings. The electromagnetic responses are analyzed by the finite-difference-time-domain (FDTD) method and temporal coupled-mode theory (TCMT). The results show that one channel of the metasurface is insensitive to the polarization angle of the incident light and temperature, while the other channel is sensitive. The reflectance and resonance wavelength can be manipulated by the polarization angle and temperature independently. Based on such a mechanism, we propose metasurfaces for two-bit programmable imaging and thermal imaging. The metasurfaces are believed to have potential applications in information processing and thermal radiation manipulation.
在本文中，我们提出了一种由分裂等边三角形环组成的双通道中红外环形超表面。采用时域有限差分法（FDTD）和时域耦合模理论（TCMT）对其电磁响应进行了分析。结果表明，超表面的一个通道对入射光的偏振角和温度不敏感，而另一个通道则敏感。反射率和共振波长可分别由偏振角和温度控制。基于这种机制，我们提出了用于二位可编程成像和热成像的超表面。这种超表面有望在信息处理和热辐射控制方面得到应用。
