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Topological surface plasmons in superlattices with changing sign of the average permittivity

Deng, H; Chen, X; Panoiu, NC; Ye, F; (2016) Topological surface plasmons in superlattices with changing sign of the average permittivity. Optics Letters , 41 (18) pp. 4281-4284. 10.1364/OL.41.004281. Green open access

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Abstract

We address the topological properties of onedimensional plasmonic superlattices composed of alternating metallic and dielectric layers. We reveal that the Zak phase of such plasmonic lattices is determined by the sign of the spatial average of their permittivity, ¯#, and as such the topology and their associated interfacial (edge) states are extremely robust against structural disorder. Our study shows that the topologically protected interfacial modes occurring at the interface between two plasmonic lattices with opposite sign of ¯# can be viewed as the generalization of the conventional surface plasmon polaritons existing at metallic-dielectric interfaces.

Type: Article
Title: Topological surface plasmons in superlattices with changing sign of the average permittivity
Open access status: An open access version is available from UCL Discovery
DOI: 10.1364/OL.41.004281
Publisher version: https://doi.org/10.1364/OL.41.004281
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/10055779
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