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Tunable plasmon induced transparency in a graphene-based waveguide structure and it’s applications in sensing
Author(s): Xu Han; Tao Wang
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Paper Abstract

In this paper, we propose dynamically tunable plasmon induced transparency (PIT) in a graphene-based nanoribbon waveguide structure by changing the chemical potential of graphene. It is the direct destructive interference between the propagating plasmonic edge mode in the graphene nanoribbon waveguide and the rectangular resonators gives rise to the PIT effect. Our numerical results reveal that high tunability in the PIT transparency window can be obtained by altering the chemical potential of the graphene rectangular resonators. Moreover, a novel plasmonic refractive index sensor (RIS) has been proposed and investigated numerically based on the PIT effect in the mid-IR range. Our calculated results exhibit that large wavelength sensitivity as high as 2500 nm/RIU and a high figure of merit (FOM) of 10.50 can be achieved in this ultra-compact structure (<0.05 μm2 ). This work not only paves a new way towards the realization of graphene-based integrated nanophotonic devices, but also has important applications in multi-channel-selective filters, sensors, and slow light.

Paper Details

Date Published: 24 August 2017
PDF: 10 pages
Proc. SPIE 10343, Metamaterials, Metadevices, and Metasystems 2017, 103432H (24 August 2017); doi: 10.1117/12.2271124
Show Author Affiliations
Xu Han, Huazhong Univ. of Science and Technology (China)
Tao Wang, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 10343:
Metamaterials, Metadevices, and Metasystems 2017
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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