In recent years, the toroidal dipole has attracted growing interests due to its unique electromagnetic radiation properties and great potential applications. However, active control of the toroidal resonance at the terahertz frequency has remained largely unexplored due to the scarcity of compact tunable elements so far. Here, dynamic control of the toroidal resonance in a micromachined reconfiguration terahertz metamaterial is proposed and demonstrated numerically. Simulated results show that for TE wave, the intensity and operating mode of the toroidal resonance can be actively controlled through driving micromachined structure. Furthermore, switching between a dual resonance and a single resonance is also realized for TM wave. Therefore, the works open on the opportunities for controlling the electromagnetic responses in free space and designing the terahertz modulators, ultrasensitive sensors and switchable devices.

近年来，环形偶极子因其独特的电磁辐射特性和巨大的潜在应用而引起了越来越多的兴趣。然而，由于迄今为止紧凑型可调谐元件的缺乏，在太赫兹频率下对环形共振的主动控制仍未得到充分研究。在此，提出了微加工的重配置太赫兹超材料中的环形共振的动态控制并进行了数值模拟。仿真结果表明，对于TE波，通过驱动微机械结构可以主动控制环形共振的强度和工作模式。此外，对于TM波，也实现了在双共振和单共振之间的切换。因此，