Manipulating topological valley modes in plasmonic metasurfaces

Nanophotonics

article

Matthew Proctor¹  Paloma A. Huidobro²  Stefan A. Maier³  Richard V. Craster¹  Mehul P. Makwana¹ 

[1] Department of Mathematics, Imperial College London;Instituto de Telecomunicações, Insituto Superior Tecnico-University of Lisbon;Faculty of Physics, Ludwig-Maximilians-Universität München;Department of Physics, Imperial College London;Multiwave Technologies AG

关键词: metal nanoparticles;    plasmonic metasurface;    topological nanophotonics;    topological plasmonics;    topological valley modes;   

DOI  :  10.1515/nanoph-2019-0408

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 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.

【 授权许可】

CC BY