期刊
NATURE COMMUNICATIONS
卷 10, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-10027-0
关键词
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资金
- National Natural Science Foundation of China [61625502, 61574127]
- Top-Notch Young Talents Program of China
- Innovation Joint Research Center for Cyber-Physical-Society System
- Singapore Ministry of Education [MOE2018-T2-1-022 (S), MOE2015-T2-1-070, MOE2016-T3-1-006, Tier 1 RG174/16 (S)]
Hyperbolic polaritons in van der Waals materials and metamaterial heterostructures provide unprecedented control over light-matter interaction at extreme nanoscales. Here we propose a concept of type-I hyperbolic metasurface supporting highly-squeezed magnetic designer polaritons, which act as magnetic analogs of hyperbolic polaritons in the hexagonal boron nitride (h-BN) in the first Reststrahlen band. Compared with the natural h-BN, the size and spacing of the metasurface unit cell can be readily engineered, allowing for manipulating designer polaritons in frequency and space with greater flexibility. Microwave experimental measurements display a cone-like dispersion in momentum space, exhibiting an effective refractive index up to 60 and a group velocity down to c/400. Tailoring the meta-surface, we demonstrate an ultra-compact integrated designer polariton circuit including hightransmission 90 degrees sharp bending waveguides and waveguide splitters. The present metasurface could serve as a platform for polaritonics, and find applications in waveguiding, terahertz sensing, subdiffraction focusing/imaging, low-threshold terahertz Cherenkov radiation, and wireless energy transfer.
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