Journal
PHYSICAL REVIEW APPLIED
Volume 12, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.12.044004
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Funding
- National Natural Science Foundation of China [61405058]
- Natural Science Foundation of Hunan Province [2017JJ2048]
- Fundamental Research Funds for the Central Universities [531118040112]
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A two-dimensional Stampfli-triangle photonic crystal (2D S-T PC), which arranges the basic structural unit of a Stampfli-type photonic quasicrystal (PQC) in a triangular lattice, is proposed. The relationship between the structural parameters and the topological trivial or nontrivial state generated in the 2D S-T PC and the relationship between the structural parameters and the frequency of the one-way propagation are analyzed. One-way propagation based on a U-shaped waveguide composed of 2D S-T PCs, with topological trivial and nontrivial states sharing a common band gap, is realized. The topological edge state, which satisfies C-6 symmetry, is realized by changing just the diameters of the cylinders in the 2D S-T PC. This provides an idea for the generation of a topological edge state based on a 2D PQC and increases the diversity and adjustability of the method to realize the topological edge state.
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