期刊
2D MATERIALS
卷 2, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1583/2/3/034013
关键词
Weyl points; three-dimensional photonic crystals; topological photonics
资金
- US Army Research Laboratory
- US Army Research Office through the Institute for Soldier Nanotechnologies [W911NF-13-D-0001]
- Solid-State Solar-Thermal Energy Conversion Center (S3TEC), an Energy Frontier Research Center - US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001299]
- MRSEC Program of the National Science Foundation [DMR-1419807]
- Unity through Knowledge Fund [5/13]
We show that Weyl points can be realized in all-dielectric superlattices based on three-dimensional (3D) layered photonic crystals. Our approach is based on creating an inversion-breaking array of weakly-coupled planar defects embedded in a periodic layered structure with a large omnidirectional photonic band gap. Using detailed band structure calculations and tight-binding theory arguments, we demonstrate that this class of layered systems can be tailored to display 3D linear point degeneracies between two photonic bands, without breaking time-reversal symmetry and using a configuration that is readily-accessible experimentally. These results open new prospects for the observation of Weyl points in the near-infrared and optical regimes and for the application of Weyl-physics in integrated photonic devices.
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