Abstract
Coupling between physical modes can trigger some new physical phenomena such as frequency shift, new mode, and Rabi splitting. Resonant modes in graphene-based metamaterials provide a new platform for the research of coupling. In this work, we demonstrate that the plasmonic coupling of split ring resonator (SRR) dimer in graphene-based metamaterials can be easily manipulated. This magnetoinductive coupling can switch on/off the dark modes easily, which is usually done by symmetry-breaking structure previously. Furthermore, the dark mode can also be activated by Fermi energy as well as carrier concentration changing with either physical or chemical methods conveniently. In addition, different graphene-based SRR dimer configurations present different coupling strengths, which benefits the designing and optimizing of graphene-based metamaterials. The demonstration could enhance the versatility of both coupling studies in terahertz (THz) region and graphene-based metamaterials for THz devices.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 11374240, No. 61265005), Ph.D. Programs Foundation of Ministry of Education of China (No. 20136101110007), Key Laboratory Science Research Plan of Shaanxi Education Department (13JS101), and National Key Basic Research Program (2014CB339800).
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Huang, Y., Yao, Z., Hu, F. et al. Manipulating Magnetoinductive Coupling with Graphene-Based Plasmonic Metamaterials in THz Region. Plasmonics 11, 963–970 (2016). https://doi.org/10.1007/s11468-015-0130-0
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DOI: https://doi.org/10.1007/s11468-015-0130-0