Tunable spectral splitting in nanoscale graphene waveguide with coupled resonators

Zhuo Cheng; Tianye Huang

doi:10.1117/1.JNP.11.036013

19 August 2017 Tunable spectral splitting in nanoscale graphene waveguide with coupled resonators

Zhuo Cheng, Tianye Huang

Author Affiliations +

Journal of Nanophotonics, Vol. 11, Issue 3, 036013 (August 2017). https://doi.org/10.1117/1.JNP.11.036013

Abstract

We propose and investigate a graphene-based resonator-coupled waveguide system comprising input/output graphene sheet bus waveguides and two graphene nanoribbon (GNR) resonators for bandpass spectral splitting. The system is composed of two graphene sheet waveguides and two GNRs located at the same side of the waveguides with different distances. The coupling between two GNRs results in the electromagnetically induced transparency effect and the bandpass spectral splitting. Moreover, benefiting from the chemical-potential-dependent optical properties of graphene, both the spectral symmetry and operation frequency can be dynamically adjusted, separately. The structure can find potential applications for integrated tunable functional devices such as filters and modulators.

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Zhuo Cheng and Tianye Huang "Tunable spectral splitting in nanoscale graphene waveguide with coupled resonators," Journal of Nanophotonics 11(3), 036013 (19 August 2017). https://doi.org/10.1117/1.JNP.11.036013

Received: 26 June 2017; Accepted: 27 July 2017; Published: 19 August 2017

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KEYWORDS

Resonators

Waveguides

Graphene

Terahertz radiation

Transparency

Optical properties

Integrated circuits

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