We have demonstrated a method for active modulating terahertz wave using CsPbBr₃ perovskite quantum dots (QDs)–embedded double-C metallic metamaterial unit cells. The resonance response frequency of the proposed CsPbBr₃ perovskite QDs-embedded metamaterial can be tuned by varying the external applied photoexcitation intensity. By doing so, we measured the dynamic terahertz wave transmission modulation and demonstrate tuning of the terahertz wave resonant response based on the optical pump fluences. The modulation speed and depth of the modulator are 5 MHz and 88.3%, respectively. Our results indicate the importance of manipulating the terahertz wave for future wireless communication.

中文翻译：

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使用CsPbBr 3钙钛矿量子点–嵌入超材料的灵敏太赫兹自由空间调制器

我们已经展示了一种使用CsPbBr ₃钙钛矿量子点（QD）嵌入的双C金属超材料单元格主动调制太赫兹波的方法。可以通过改变外部施加的光激发强度来调整建议的CsPbBr ₃钙钛矿QDs嵌入超材料的共振响应频率。通过这样做，我们测量了动态太赫兹波传输调制，并演示了基于光泵注量的太赫兹波谐振响应的调谐。调制器的调制速度和深度分别为5 MHz和88.3％。我们的结果表明操纵太赫兹波对于未来无线通信的重要性。