双功能
极化(电化学)
材料科学
红外线的
光电子学
传输(电信)
相(物质)
太赫兹辐射
等离子体子
可扩展性
光学
计算机科学
物理
电信
化学
数据库
物理化学
量子力学
催化作用
生物化学
作者
Andriy E. Serebryannikov,Akhlesh Lakhtakia,Ekmel Ozbay
摘要
We conceptualized three-array scalable bifunctional metasurfaces comprising only three thin strip grids and numerically determined their characteristics in the mid-infrared spectral regime for switchable operation scenarios involving polarization manipulation and related diodelike asymmetric transmission (AT) as one of two functionalities. A few or all of the grids were taken to be made of VO 2 , a bifunctionality-enabling phase-change material; there are no layers and/or meta-atoms comprising simultaneously both metal and VO 2 . For each proposed metasurface, two effective structures and, therefore, two different functionalities exist, corresponding to the metallic and insulating phases of VO 2 . The achieved scenarios of functionality switching significantly depend on the way in which VO 2 is incorporated into the metasurface. Switchable bands of polarization manipulation are up to 40 THz wide. The AT band can be modulated when Fabry–Perot (anti-) resonances come into play. Besides, transmission regimes with the cross-polarized component insensitive to VO 2 phase change are possible, as well as the ones with all co- and cross-polarized components having the same magnitude for both linear polarizations of the incident wave.
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