We present a controllable terahertz (THz) metamaterial switch by manipulating toroidal dipolar mode in simulation. The metamaterial switch consists of periodically patterned metallic split rings with photosensitive silicon stripes. The excitation of toroidal dipolar resonance is closely dependent on the transition between the dielectric and conductive phases of photosensitive silicon. The toroidal dipolar mode is exploited to modulate the ON/OFF-switching transmission of THz wave under wide incident angles. The operation mechanism and frequency tunability are discussed.

中文翻译：

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使用超材料的环形双极模式的可控太赫兹开关

我们通过在仿真中操纵环形偶极模式，提出了一种可控的太赫兹（THz）超材料开关。超材料开关由带有感光硅条的周期性图案化金属开口环组成。环形偶极共振的激发紧密依赖于光敏硅的介电相和导电相之间的过渡。环形双极模式用于在宽入射角下调制太赫兹波的开/关转换传输。讨论了其工作机理和频率可调性。