Topological Corner Modes in Graphene-Coated Nanowire Waveguide
| Autor: | Qing Liao, Chizhu Ding, Shaolin Ke, Ningliang Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanowire Physics::Optics 02 engineering and technology Edge (geometry) Topology 01 natural sciences lcsh:Technology plasmonics law.invention 010309 optics lcsh:Chemistry law 0103 physical sciences General Materials Science corner modes Instrumentation lcsh:QH301-705.5 Plasmon Fluid Flow and Transfer Processes Mode volume Graphene lcsh:T Process Chemistry and Technology graphene General Engineering 021001 nanoscience & nanotechnology lcsh:QC1-999 Computer Science Applications Lattice (module) Wavelength lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) Waveguide lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 10, Iss 4027, p 4027 (2020) Applied Sciences Volume 10 Issue 11 |
| ISSN: | 2076-3417 |
| Popis: | We study the plasmonic second-order topological modes in nanowire waveguides which are covered by monolayer graphene. The waveguide arrays are arranged in the kagome lattice. In a triangle-shaped lattice, the topological modes are localized at the corner of the triangle by tuning the spatial spacing between the different waveguides. The corner modes also depend on the corner shape, which only exist at one corner in a rhombic lattice. In addition to the corner modes, both structures also support the topological edge mode. We show that the corner modes experience a smaller modal wavelength, longer propagation distance, and smaller mode volume than the edge modes. The study may be utilized to explore the topological bound modes at the nanoscale. |
| Databáze: | OpenAIRE |
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