Abstract A dynamically tunable multi-resonance and polarization-insensitive electromagnetically induced transparency-like (EIT-like) metamaterial is proposed. The EIT-like structure consists of four cut-wire metals and a square metal frame. Two distinct transparency windows resulting from the near field coupling can be observed under x and y polarization directions, respectively. The physical mechanism of the proposed EIT-like metamaterial can be explained by the surface current distributions. The EIT-like effect can be adjusted by tuning the conductivity of vanadium dioxide (VO2). Meanwhile, a low-loss EIT-like metamaterial can be obtained, which can be proved by the effective medium theory. In addition, the EIT-like metamaterial shows polarization-insensitive characteristics for x and y polarized incidence. By varying the conductivity of VO2, the EIT-like windows and slow-light effect can be manipulated dynamically. These features can provide potential applications in terahertz modulators and slow-light terahertz devices.

中文翻译：

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基于二氧化钒薄膜的动态可调多谐振和偏振不敏感电磁感应透明

摘要 提出了一种动态可调的多谐振和极化不敏感的电磁感应透明类（EIT-like）超材料。类似 EIT 的结构由四个切割金属丝和一个方形金属框架组成。可以分别在 x 和 y 偏振方向下观察到由近场耦合产生的两个不同的透明窗口。所提出的类 EIT 超材料的物理机制可以通过表面电流分布来解释。可以通过调整二氧化钒 (VO2) 的电导率来调整类似 EIT 的效果。同时，可以获得一种低损耗的类EIT超材料，这可以被有效介质理论证明。此外，类 EIT 超材料对 x 和 y 偏振入射显示偏振不敏感特性。通过改变 VO2 的电导率，可以动态操纵类似 EIT 的窗口和慢光效果。这些特性可以在太赫兹调制器和慢光太赫兹器件中提供潜在的应用。