Abstract
In this paper, we numerically and theoretically investigate the propagation of surface plasmon polaritons in a graphene-based resonator-coupled waveguide system, consisting of a monolayer graphene ribbon coupling to two graphene sheets. The resonance wavelength of this system can be easily tuned by adjusting the chemical potential and the width of the graphene ribbon. Both resonance bandwidth and spectral transmission characteristics of the structure strongly depend on the coupling distance and overlap length between the graphene ribbon and graphene sheets. The structural symmetry is found to be another essential parameter. The presented results may pave the way toward the dynamic control of light propagation in graphene-based structures and the realization of tunable graphene-based optoelectronic devices.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China under Grants A040407 and F050210. The author also acknowledges the support from Australia Research Council (ARC) Centre from Ultrahigh-bandwidth Devices for Optical Systems (CUDOS) (project number CE110001018). The author acknowledges the assistance and helpful discussions from Dr. Guoxi Wang, Dr. Wenfu Zhang and Mr. Chao Zeng from Xi’an Institute of Optics and Precision Mechanics as well as Dr. Yinan Zhang and Dr. Philipp Reineck at Swinburne University of Technology.
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Lu, H. Plasmonic characteristics in nanoscale graphene resonator-coupled waveguides. Appl. Phys. B 118, 61–67 (2015). https://doi.org/10.1007/s00340-014-5954-3
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DOI: https://doi.org/10.1007/s00340-014-5954-3