Optoelectronic terahertz modulators, operated by actively tuning metamaterial, plasmonic resonator structures, have helped to unlock a myriad of terahertz applications, ranging from spectroscopy and imaging to communications. At the same time, due to the inherently versatile dispersion properties of metamaterials, they offer unique platforms for studying intriguing phenomena such as negative refractive index and slow light. Active resonance frequency tuning of a metamaterial working in the terahertz regime is achieved by integrating metal‐coupled resonator arrays with electrically tunable graphene. This metamaterial device exploits coupled plasmonic resonators to exhibit an electromagnetically induced transparency analog, resulting in the splitting of the resonance into coupled hybrid optical modes. By variably dampening one of the resonators using graphene, the coupling condition is electrically modulated and continuous tuning of the metamaterial resonance frequency is achieved. This device, operating at room temperature, can readily be implemented as a fast, optoelectronic, tunable band pass/reject filter with a tuning range of ≈100 GHz operating at 1.5 THz. The reconfigurable dispersion properties of this device can also be implemented for modulation of the group delay for slow light applications.

中文翻译：

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具有连续共振频率调谐的石墨烯太赫兹超材料阵列中电磁感应透明度的主动控制

光电太赫兹调制器通过主动调谐超材料等离子共振器结构进行操作，已帮助解锁了从光谱学，成像到通信等众多太赫兹应用。同时，由于超常材料固有的通用分散特性，它们提供了独特的平台来研究有趣的现象，例如负折射率和慢光。通过将金属耦合谐振器阵列与电可调石墨烯集成在一起，可以实现在太赫兹范围内工作的超材料的主动谐振频率调谐。这种超材料装置利用耦合的等离子体共振器来表现出电磁感应的透明模拟，从而将共振分解为耦合的混合光学模式。通过使用石墨烯可变地衰减谐振器之一，可以对耦合条件进行电调制，并实现超材料谐振频率的连续调谐。该器件在室温下运行，可以很容易地实现为一个快速，光电，可调带通/抑制滤波器，其调谐范围为1.5 THz，≈100GHz。该器件的可重配置色散特性也可以用于慢光应用中的群时延调制。