Work

Plasmon-polaritonic quadrupole topological insulators

Year: 2020

Type: article

Abstract: Quadrupole topological insulator is a symmetry-protected higher-order topological phase with the intriguing topology of Wannier bands, which, however, has not yet been realized in plasmonic metamaterials. Here, we propose a lattice of plasmon-polaritonic nanocavities which can realize quadrupole topological insulators by exploiting the geometry-dependent sign reversal of the couplings between the daisylike nanocavities. The designed system exhibits various topological and trivial phases as characterized by the nested Wannier bands and the topological quadrupole moment which can be controlled by the distances between the nanocavities. Our study opens a pathway toward plasmonic topological metamaterials with quadrupole topology.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.101.041109

Authors: Ying Chen, Zhi-Kang Lin, Huanyang Chen, Jian-Hua Jiang

Institutions: Xiamen University, Soochow University, Collaborative Innovation Center of Suzhou Nano Science and Technology

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Fundamental Research Funds for the Central Universities

Awards: G4242834790, G5087029257