Abstract We theoretically investigate the active control of electromagnetic induced transparency (EIT) in a terahertz graphene-based metamaterial, whose unit cell structure is composed two perpendicularly connected graphene cut-wires. The theoretical investigations and field distributions reveal that the EIT window arises from the destructive interference caused by asymmetric coupling between two cut-wire structures. Moreover, the strength and frequency of the EIT peak, the associated group delay and delay bandwidth product can be actively controlled. Therefore, the work presents a novel modulation strategy for controlling EIT behavior and exhibits potential applications for switching, modulation, and slow-light devices.

中文翻译：

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太赫兹区域非对称石墨烯基超材料的可调谐电磁感应透明度

摘要 我们从理论上研究了基于太赫兹石墨烯的超材料中电磁感应透明 (EIT) 的主动控制，其晶胞结构由两个垂直连接的石墨烯切割线组成。理论研究和场分布表明，EIT 窗口是由两个切割线结构之间的不对称耦合引起的破坏性干扰引起的。此外，可以主动控制 EIT 峰值的强度和频率、相关的群延迟和延迟带宽积。因此，这项工作提出了一种控制 EIT 行为的新型调制策略，并展示了开关、调制和慢光设备的潜在应用。