Recently, the actively controlled meta‐atoms have been employed to manipulate terahertz (THz) waves allowing for the implementation of many functionalities operating. A salient example of such systems is the electromagnetically induced transparency (EIT) metaphotonic device, which opens up a new avenue for THz manipulations. However, these devices are currently limited to be tuned at a given frequency, which severely impedes their practical applications. Here, novel photo‐active THz meta‐atoms are proposed, whose EIT resonance is equipped with a frequency tuning functionality up to 36%. At different levels of optical pumping power, a substantial modulation of EIT resonance is realized at the fundamental and shifted frequency, respectively. Moreover, the ultrafast dynamics manifest the switching time scale of ≈1 ns. This configuration is easily extensible by other types of stimuli, which may contribute to the development of multifunctional active tuning meta‐photonic systems.

中文翻译：

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太赫兹超光子器件中电磁感应的透明度的超快频移

最近，主动控制的准原子已被用来操纵太赫兹（THz）波，从而实现了许多功能性操作的实现。这种系统的一个突出例子是电磁感应透明（EIT）超光子器件，它为THz操纵开辟了一条新途径。但是，这些设备目前仅限于以给定的频率进行调谐，这严重阻碍了它们的实际应用。在这里，提出了新颖的光敏太赫兹超原子，其EIT共振具有高达36％的频率调谐功能。在不同水平的光泵浦功率下，分别在基频和频移下实现了EIT共振的实质调制。此外，超快的动力学表现出约1 ns的切换时间范围。