Journal
NATURE PHOTONICS
Volume 14, Issue 2, Pages 89-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41566-019-0561-9
Keywords
-
Categories
Funding
- Defense Advanced Research Projects Agency under the Nascent programme [HR00111820040]
- National Science Foundation [EFRI-1641069, DMR-1809915]
- Russian Science Foundation [16-19-10538]
- Russian Foundation for Basic Research [18-32-20065]
Ask authors/readers for more resources
Photonic topological insulators enable topological boundary modes that are resilient to defects and disorder, irrespective of manufacturing precision. This property is known as topological protection. Although originally limited to dimensionality of modes one lower than that of topological insulators, the recently discovered higher-order topological insulators (HOTIs) offer topological protection over an extended range of dimensionalities. Here, we introduce a photonic HOTI with kagome lattice that exhibits topological bulk polarization, leading to the emergence of one-dimensional edge states, as well as higher-order zero-dimensional states confined to the corners of the structure. Interestingly, in addition to the corner states due to nearest-neighbour interactions, we discover a new class of topological corner states induced by long-range interactions and specific to photonic systems. Our findings demonstrate that photonic HOTIs possess richer physics than their condensed-matter counterparts, offering opportunities for engineering novel designer electromagnetic states with unique topological robustness. One- and zero-dimensional optical states are revealed in photonic higher-order topological insulators.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available