Plasmonic Jackiw-Rebbi Modes in Graphene Waveguide Arrays
Source abstract
Abstract
We investigate the topological bound modes of surface plasmon polaritons (SPPs) in a graphene pair waveguide array. The arrays are with uniform inter-layer and intra-layer spacings but the chemical potential of two graphene in each pair are different. The topological bound modes emerge when two arrays with opposite sequences of chemical potential are interfaced, which are analogous to Jackiw-Rebbi modes with opposite mass. We show the topological bound modes can be dynamically controlled by tuning the chemical potential, and the propagation loss of topological bound modes can be remarkably reduced by decreasing the chemical potential. Thanks to the strong confinement of graphene SPPs, the modal wavelength of topological bound modes can be squeezed as small as 1/70 of incident wavelength. The study provides a promising approach to realizing robust light transport beyond diffraction limit.
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Research context
OpenAlex topics: Plasmonic and Surface Plasmon Research · Photonic and Optical Devices · Photonic Crystals and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology, Wuhan 430205, China
School of Mathematics and Statistics, Hubei University of Science and Technology, Xianning 437100, China
CNRS-International-NTU-THALES-Research-Alliance (CINTRA), Nanyang Technological University, Singapore
Funding
National Natural Science Foundation of China · Program for Distinguished Middle-aged and Young Innovative Research Team in Higher Education of Hubei, China · the Campus Science Foundation Research Project of Wuhan Institute of Technology · the Colleges and Universities of National Innovation and Entrepreneurship Training Plan
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