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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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Multiband topological states in the Penrose-triangle photonic crystals
Optics Letters
|December 23, 2022
Summary
Researchers developed a novel Penrose-triangle photonic crystal for enhanced light manipulation. This structure generates multiple topological states, improving performance and integration of photonic devices.
Area of Science:
- Photonics
- Condensed Matter Physics
- Materials Science
Background:
- Topological edge states (TES) and topological corner states (TCS) are crucial for controlling light propagation in photonic crystals (PCs).
- Improving the performance and integration of topological photonic devices requires exploring multiband topological states using quasi-periodic structures.
Purpose of the Study:
- To propose a new Penrose-triangle (P-T) photonic crystal (PC) structure capable of generating multiband topological states.
- To investigate the potential of this P-T PC for enhanced light manipulation and device integration.
Main Methods:
- A Penrose-triangle (P-T) PC was designed by arranging a 12-fold Penrose-type photonic quasi-crystal (PQC) unit in a triangular lattice.
- Numerical simulations were employed to analyze the generation of topological states within the proposed structure.
Main Results:
- The P-T PC successfully generated both topological edge states (TES) and topological corner states (TCS) in low- and high-frequency bands within the same structure.
- Three distinct groups of topological corner states (TCSs) were realized, demonstrating multiband topological properties.
Conclusions:
- The proposed Penrose-triangle photonic crystal offers a novel platform for generating multiple topological states.
- This structure presents a new avenue for enhancing the performance and integration of topological photonic devices.
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