Gated Graphene Enabled Tunable Charge-Current Configurations in Hybrid Plasmonic Metamaterials
Gated Graphene Enabled Tunable Charge-Current Configurations in Hybrid Plasmonic Metamaterials
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DOI：
10.1021/acsaelm.9b00035
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发表时间：
2019-05-01
影响因子：
4.7
通讯作者：
Mishra, Yogendra Kumar
中科院分区：
文献类型：
--
作者：
Ahmadivand, Arash;Gerislioglu, Burak;Mishra, Yogendra Kumar
基于人工设计的等离子体超分子沉积在栅极控制的石墨烯层上，展示了一种有源混合环形超表面。我们的数值预测证实了太赫兹频率范围内的室温时域光谱表征。我们定量和定性地表明，栅极控制的有源石墨烯超材料允许通过调谐强耦合谐振器中的自旋磁场中的基本失配来主动调谐动态非辐射环形偶极子。它表明，这一功能可以通过改变栅控石墨烯的电阻率和调整系统的临界开口处的电容耦合来获得。
An active hybrid toroidal metasurface is demonstrated based on artificially engineered plasmonic metamolecules deposited on a gate-controlled graphene layer. Our numerical predictions are confirmed by room-temperature time-domain spectroscopy characterizations in the terahertz frequency range. We quantitatively and qualitatively show that the gate-controlled active graphene metamaterial allows for an active tuning of the dynamic nonradiating toroidal dipole by tuning the essential mismatch in the spinning magnetic fields in the strongly coupled resonators. It is demonstrated that this feature can be obtained by varying the resistivity of gate-controlled graphene and tuning the capacitive coupling at the critical openings of the system.