文章基本信息

标题：Manipulating topological valley modes in plasmonic metasurfaces
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作者：Matthew Proctor ; Paloma A. Huidobro ; Stefan A. Maier 等
期刊名称：Nanophotonics
印刷版ISSN：2192-8606
电子版ISSN：2192-8614
出版年度：2020
卷号：9
期号：3
页码：657-665
DOI：10.1515/nanoph-2019-0408
出版社：Walter de Gruyter GmbH
摘要：Coupled light-matter modes supported by plasmonic metasurfaces can be combined with topological principles to yield subwavelength topological valley states of light. This study gives a systematic presentation of the topological valley states available for lattices of metallic nanoparticles (NPs): all possible lattices with hexagonal symmetry are considered as well as valley states emerging on a square lattice. Several unique effects that have yet to be explored in plasmonics are identified, such as robust guiding, filtering, and splitting of modes, as well as dual-band effects. These are demonstrated by means of scattering computations based on the coupled dipole method that encompass full electromagnetic interactions between NPs.
关键词：metal nanoparticles ; plasmonic metasurface ; topological nanophotonics ; topological plasmonics ; topological valley modes