Topological insulator properties of photonic kagome helical waveguide arrays

Hua Zhong; Rong Wang; Fangwei Ye; Jingwen Zhang; Lei Zhang; Yanpeng Zhang; Milivoj R. Belić; Yiqi Zhang

doi:10.1016/j.rinp.2018.12.053

Topological insulator properties of photonic kagome helical waveguide arrays

Hua Zhong, Rong Wang, Fangwei Ye, Jingwen Zhang, Lei Zhang, Yanpeng Zhang, Milivoj R. Belić, Yiqi Zhang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

We investigate topological insulator properties of the kagome helical waveguide array, by utilizing theoretical and numerical means. The time-reversal symmetry of the kagome lattice is broken by helicity, and a photonic topological insulator is formed. The Berry curvature and Chern number of the band structure are calculated, to verify the topological phase transition, caused by the helicity. Unidirectional propagation and topological protection properties of the edge states at certain momentum values are demonstrated. Interestingly, the same kagome helical waveguide array, may support topological edge states with different momenta propagating along the same boundary but in opposite directions.

Original language	English
Pages (from-to)	996-1001
Number of pages	6
Journal	Results in Physics
Volume	12
DOIs	https://doi.org/10.1016/j.rinp.2018.12.053
Publication status	Published - Mar 2019
Externally published	Yes

Keywords

Edge state
Kagome lattice
Topological insulator

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10.1016/j.rinp.2018.12.053

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title = "Topological insulator properties of photonic kagome helical waveguide arrays",

abstract = "We investigate topological insulator properties of the kagome helical waveguide array, by utilizing theoretical and numerical means. The time-reversal symmetry of the kagome lattice is broken by helicity, and a photonic topological insulator is formed. The Berry curvature and Chern number of the band structure are calculated, to verify the topological phase transition, caused by the helicity. Unidirectional propagation and topological protection properties of the edge states at certain momentum values are demonstrated. Interestingly, the same kagome helical waveguide array, may support topological edge states with different momenta propagating along the same boundary but in opposite directions.",

keywords = "Edge state, Kagome lattice, Topological insulator",

author = "Hua Zhong and Rong Wang and Fangwei Ye and Jingwen Zhang and Lei Zhang and Yanpeng Zhang and Beli{\'c}, {Milivoj R.} and Yiqi Zhang",

note = "Publisher Copyright: {\textcopyright} 2018 The Authors",

year = "2019",

month = mar,

doi = "10.1016/j.rinp.2018.12.053",

language = "English",

volume = "12",

pages = "996--1001",

journal = "Results in Physics",

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T1 - Topological insulator properties of photonic kagome helical waveguide arrays

AU - Zhong, Hua

AU - Wang, Rong

AU - Ye, Fangwei

AU - Zhang, Jingwen

AU - Zhang, Lei

AU - Zhang, Yanpeng

AU - Belić, Milivoj R.

AU - Zhang, Yiqi

PY - 2019/3

Y1 - 2019/3

N2 - We investigate topological insulator properties of the kagome helical waveguide array, by utilizing theoretical and numerical means. The time-reversal symmetry of the kagome lattice is broken by helicity, and a photonic topological insulator is formed. The Berry curvature and Chern number of the band structure are calculated, to verify the topological phase transition, caused by the helicity. Unidirectional propagation and topological protection properties of the edge states at certain momentum values are demonstrated. Interestingly, the same kagome helical waveguide array, may support topological edge states with different momenta propagating along the same boundary but in opposite directions.

AB - We investigate topological insulator properties of the kagome helical waveguide array, by utilizing theoretical and numerical means. The time-reversal symmetry of the kagome lattice is broken by helicity, and a photonic topological insulator is formed. The Berry curvature and Chern number of the band structure are calculated, to verify the topological phase transition, caused by the helicity. Unidirectional propagation and topological protection properties of the edge states at certain momentum values are demonstrated. Interestingly, the same kagome helical waveguide array, may support topological edge states with different momenta propagating along the same boundary but in opposite directions.

KW - Edge state

KW - Kagome lattice

KW - Topological insulator

UR - http://www.scopus.com/inward/record.url?scp=85059139174&partnerID=8YFLogxK

U2 - 10.1016/j.rinp.2018.12.053

DO - 10.1016/j.rinp.2018.12.053

M3 - Article

AN - SCOPUS:85059139174

SN - 2211-3797

VL - 12

SP - 996

EP - 1001

JO - Results in Physics

JF - Results in Physics

ER -

Topological insulator properties of photonic kagome helical waveguide arrays

Abstract

Keywords

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