期刊
SCIENCE BULLETIN
卷 65, 期 7, 页码 531-537出版社
ELSEVIER
DOI: 10.1016/j.scib.2020.01.024
关键词
Topological corner states; Topological kink states; Topological quantum dot; Honeycomb photonic crystal; Domain-wall-induced topological states
资金
- National Basic Research Program of China [2019YFA0308403]
- National Natural Science Foundation of China [11534001, 11822407, 11874274]
- Natural Science Foundation of Jiangsu Province [BK20170058]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Based on the tight-binding calculations on honeycomb lattice and photonic experimental visualization on artificial graphene (AG), we report the domain-wall-induced gapped topological kink states and topological corner states. In honeycomb lattice, domain walls (DWs) with gapless topological kink states could be induced either by sublattice symmetry breaking or by lattice deformation. We find that the coexistence of these two mechanisms will induce DWs with gapped topological kink states. Significantly, the intersection of these two types of DWs gives rise to topological corner state localized at the crossing point. Through the manipulation of the DWs, we show AG with honeycomb lattice structure not only a versatile platform supporting multiple topological corner modes in a controlled manner, but also possessing promising applications such as fabricating topological quantum dots composed of gapped topological kink states and topological corner states. (C) 2020 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
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