Higher-order topological states in photonic kagome crystals with long-range interactions
5
Photonics Initiative, Advanced Science Research Center, City University of New York, New York, USA
|
Publication type: Journal Article
Publication date: 2019-12-09
scimago Q1
wos Q1
SJR: 11.546
CiteScore: 53.6
Impact factor: 32.9
ISSN: 17494885, 17494893
Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Abstract
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.
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GOST
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Li M. et al. Higher-order topological states in photonic kagome crystals with long-range interactions // Nature Photonics. 2019. Vol. 14. No. 2. pp. 89-94.
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Li M., Zhirihin D., Gorlach M. A., Ni X., Filonov D. S., Slobozhanyuk A., Alu A., Khanikaev A. B. Higher-order topological states in photonic kagome crystals with long-range interactions // Nature Photonics. 2019. Vol. 14. No. 2. pp. 89-94.
Cite this
RIS
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TY - JOUR
DO - 10.1038/s41566-019-0561-9
UR - https://doi.org/10.1038/s41566-019-0561-9
TI - Higher-order topological states in photonic kagome crystals with long-range interactions
T2 - Nature Photonics
AU - Li, Mengyao
AU - Zhirihin, Dmitry
AU - Gorlach, Maxim A.
AU - Ni, Xiang
AU - Filonov, Dmitry S.
AU - Slobozhanyuk, Alexey
AU - Alu, Andrea
AU - Khanikaev, Alexander B.
PY - 2019
DA - 2019/12/09
PB - Springer Nature
SP - 89-94
IS - 2
VL - 14
SN - 1749-4885
SN - 1749-4893
ER -
Cite this
BibTex (up to 50 authors)
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@article{2019_Li,
author = {Mengyao Li and Dmitry Zhirihin and Maxim A. Gorlach and Xiang Ni and Dmitry S. Filonov and Alexey Slobozhanyuk and Andrea Alu and Alexander B. Khanikaev},
title = {Higher-order topological states in photonic kagome crystals with long-range interactions},
journal = {Nature Photonics},
year = {2019},
volume = {14},
publisher = {Springer Nature},
month = {dec},
url = {https://doi.org/10.1038/s41566-019-0561-9},
number = {2},
pages = {89--94},
doi = {10.1038/s41566-019-0561-9}
}
Cite this
MLA
Copy
Li, Mengyao, et al. “Higher-order topological states in photonic kagome crystals with long-range interactions.” Nature Photonics, vol. 14, no. 2, Dec. 2019, pp. 89-94. https://doi.org/10.1038/s41566-019-0561-9.