Reconfigurable Topological Phases in Two-Dimensional Dielectric Photonic Crystals
| Autor: | Jiu-jiu Chen, Hongbo Huang, Shaoyong Huo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Photon
General Chemical Engineering 02 engineering and technology Dielectric Topology 01 natural sciences Topological defect Inorganic Chemistry reconfigurable topological one-way propagation 0103 physical sciences photonic topological insulator multiple topological phase transitions lcsh:QD901-999 General Materials Science Hexagonal lattice 010306 general physics Photonic crystal Physics business.industry 021001 nanoscience & nanotechnology Condensed Matter Physics Topological insulator lcsh:Crystallography Photonics 0210 nano-technology business Microwave |
| Zdroj: | Crystals Volume 9 Issue 4 Crystals, Vol 9, Iss 4, p 221 (2019) |
| ISSN: | 2073-4352 |
| DOI: | 10.3390/cryst9040221 |
| Popis: | The extensive research on photonic topological insulators has opened up an intriguing way to control electromagnetic (EM) waves. In this work, we numerically demonstrate reconfigurable microwave photon analogues of topological insulator (TIs) in a triangular lattice of elliptical cylinders, according to the theory of topological defects. Multiple topological transitions between the trivial and nontrivial photonic phases can be realized by inhomogeneously changing the ellipse orientation, without altering the lattice structure. Topological protection of the edge states and reconfigurable topological one-way propagation at microwave frequencies, are further verified. Our approach provides a new route towards freely steering light propagations in dielectric photonic crystals (PCs), which has potential applications in the areas of topological signal processing and sensing. |
| Databáze: | OpenAIRE |
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