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Title: Type-I hyperbolic metasurfaces for highly-squeezed designer polaritons with negative group velocity
Authors: Yang, Yihao
Qin, Pengfei
Lin, Xiao
Li, Erping
Wang, Zuojia
Zhang, Baile
Chen, Hongsheng
Keywords: Science::Physics
Issue Date: 2019
Source: Yang, Y., Qin, P., Lin, X., Li, E., Wang, Z., Zhang, B., & Chen, H. (2019). Type-I hyperbolic metasurfaces for highly-squeezed designer polaritons with negative group velocity. Nature Communications, 10(1), 2002-. doi:10.1038/s41467-019-10027-0
Series/Report no.: Nature Communications
Abstract: 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 metasurface, we demonstrate an ultra-compact integrated designer polariton circuit including high-transmission 90° 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.
DOI: 10.1038/s41467-019-10027-0
Rights: © 2019 The Author(s). Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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