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Nanomaterials 2019, 9(3), 448;

Tunable Graphene-Based Plasmon-Induced Transparency Based on Edge Mode in the Mid-Infrared Region

College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410072, China
College of Physics and Electronics, Hunan University, Changsha 410006, China
Authors to whom correspondence should be addressed.
Received: 11 February 2019 / Revised: 13 March 2019 / Accepted: 13 March 2019 / Published: 17 March 2019
(This article belongs to the Special Issue Graphene-Based Nanostructures and Optoelectronic Applications)
PDF [3506 KB, uploaded 17 March 2019]


A monolayer-graphene-based concentric-double-rings (CDR) structure is reported to achieve broadband plasmon-induced transparency (PIT) on the strength of edge mode in the mid-infrared regime. The theoretical analysis and simulation results reveal that the structure designed here has two plasmonic resonance peaks at 39.1 and 55.4 THz, and a transparency window with high transmission amplitude at the frequency of 44.1 THz. Based on the edge mode coupling between neighbor graphene ribbons, PIT phenomenon is produced through the interference between different (bright and dark) modes. The frequency and bandwidth of the transparency window and slow light time could be effectively adjusted and controlled via changing geometrical parameters of graphene or applying different gate voltages. Additionally, this structure is insensitive to the polarization and incident angle. This work has potential application on the optical switches and slow light modulators. View Full-Text
Keywords: graphene; plasmon-induced transparency; edge mode; electric field distribution graphene; plasmon-induced transparency; edge mode; electric field distribution

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Xu, H.; Zhang, Z.; Wang, S.; Liu, Y.; Zhang, J.; Chen, D.; Ouyang, J.; Yang, J. Tunable Graphene-Based Plasmon-Induced Transparency Based on Edge Mode in the Mid-Infrared Region. Nanomaterials 2019, 9, 448.

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