Dynamic inversion of planar-chiral response of terahertz metasurface based on critical transition of checkerboard structures
Dynamic inversion of planar-chiral response of terahertz metasurface based on critical transition of checkerboard structures
复制标题
基于棋盘结构临界跃迁的太赫兹超表面平面手征响应的动态反演
DOI：
10.1515/nanoph-2021-0671
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发表时间：
2022-01
期刊：
影响因子：
7.5
通讯作者：
Y. Urade;Kai Fukawa;F. Miyamaru;K. Okimura;T. Nakanishi;Y. Nakata
中科院分区：
文献类型：
--
作者：
Y. Urade;Kai Fukawa;F. Miyamaru;K. Okimura;T. Nakanishi;Y. Nakata
摘要在太赫兹波段，实验证明了超颖表面的平面手征响应的动态反演。为了实现这种反演，棋盘状金属结构的临界转变被使用。具有平面手性的共振结构及其互补的对映体图案嵌入棋盘中。使用二氧化钒作为可变电阻，超表面在太赫兹范围内实现。超颖表面的圆偏振波的响应，然后其特征在于太赫兹时域光谱。此外，圆转换二向色性的符号，这是密切相关的超表面的平面手性的手性，被观察到反转在0.64太赫兹通过改变温度。这种可逆的平面手征响应可以实际应用于手征可逆的手征反射镜。
Abstract Dynamic inversion of the planar-chiral responses of a metasurface is experimentally demonstrated in the terahertz regime. To realize this inversion, the critical transition of the checkerboard-like metallic structures is used. Resonant structures with planar chirality and their complementary enantiomeric patterns are embedded in the checkerboard. Using vanadium dioxide as a variable resistance, the metasurface is implemented in the terahertz regime. The responses of the metasurface to circularly polarized waves are then characterized by terahertz time-domain spectroscopy. Further, the sign of the circular conversion dichroism, which is closely related to the handedness of the planar chirality of the metasurface, is observed to be inverted at 0.64 THz by varying the temperature. Such invertible planar-chiral responses can be applied practically to the handedness-invertible chiral mirrors.