Demonstration of higher-order topological States in photonic kagome lattice with next-nearest-neighbour coupling

D. Zhirihin, M. Li, M. Gorlach, X. Ni, D. Filonov, A. Slobozhanyuk, A. Alu, A. B. Khanikaev

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, we investigate topological states in a two-dimensional distorted Kagome lattice with next- nearest-neighbour (NNN) coupling. We show that introducing NNN coupling leads to the emergence of a new type of higher-order corner states in a non-trivial topological phase. Using near-field scanning technique, we verify our theoretical predictions in the microwave frequency range and demonstrate field profiles for both conventional and new type of corner states. The experimental results are in perfect agreement with numerical simulations of finite structure.

Original languageEnglish
Title of host publication5th International Conference on Metamaterials and Nanophotonics, METANANO 2020
EditorsPavel Belov, Mihail Petrov
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735440340
DOIs
StatePublished - 8 Dec 2020
Externally publishedYes
Event5th International Conference on Metamaterials and Nanophotonics, METANANO 2020 - St. Petersburg, Virtual, Russian Federation
Duration: 14 Sep 202018 Sep 2020

Publication series

NameAIP Conference Proceedings
Volume2300
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference5th International Conference on Metamaterials and Nanophotonics, METANANO 2020
Country/TerritoryRussian Federation
CitySt. Petersburg, Virtual
Period14/09/2018/09/20

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