Topological insulator properties of photonic kagome helical waveguide arrays

Topological insulator properties of photonic kagome helical waveguide arrays

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 ban...

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Main Authors: Hua Zhong, Rong Wang, Fangwei Ye, Jingwen Zhang, Lei Zhang, Yanpeng Zhang, Milivoj R. Belić, Yiqi Zhang
Format: Article
Language:English
Published: Elsevier 2019-03-01
Series:Results in Physics
Online Access:http://www.sciencedirect.com/science/article/pii/S2211379718330274
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spelling doaj-a759bc585394439a805ea7d6685a51a92020-11-24T21:16:17ZengElsevierResults in Physics2211-37972019-03-01129961001Topological insulator properties of photonic kagome helical waveguide arraysHua Zhong0Rong Wang1Fangwei Ye2Jingwen Zhang3Lei Zhang4Yanpeng Zhang5Milivoj R. Belić6Yiqi Zhang7Guangdong Xi’an Jiaotong University Academy, Foshan 528300, China; Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, Xi’an Jiaotong University, Xi’an 710049, China; School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, ChinaGuangdong Xi’an Jiaotong University Academy, Foshan 528300, China; Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, Xi’an Jiaotong University, Xi’an 710049, China; School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, ChinaSchool of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, ChinaKey Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, Xi’an Jiaotong University, Xi’an 710049, China; School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, ChinaKey Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, Xi’an Jiaotong University, Xi’an 710049, China; School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, ChinaKey Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, Xi’an Jiaotong University, Xi’an 710049, China; School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, ChinaScience Program, Texas A&M University at Qatar, P.O. Box 23874 Doha, QatarGuangdong Xi’an Jiaotong University Academy, Foshan 528300, China; Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, Xi’an Jiaotong University, Xi’an 710049, China; School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China; Corresponding author at: Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China.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: Kagome lattice, Topological insulator, Edge statehttp://www.sciencedirect.com/science/article/pii/S2211379718330274
collection DOAJ
language English
format Article
sources DOAJ
author Hua Zhong
Rong Wang
Fangwei Ye
Jingwen Zhang
Lei Zhang
Yanpeng Zhang
Milivoj R. Belić
Yiqi Zhang
spellingShingle Hua Zhong
Rong Wang
Fangwei Ye
Jingwen Zhang
Lei Zhang
Yanpeng Zhang
Milivoj R. Belić
Yiqi Zhang
Topological insulator properties of photonic kagome helical waveguide arrays
Results in Physics
author_facet Hua Zhong
Rong Wang
Fangwei Ye
Jingwen Zhang
Lei Zhang
Yanpeng Zhang
Milivoj R. Belić
Yiqi Zhang
author_sort Hua Zhong
title Topological insulator properties of photonic kagome helical waveguide arrays
title_short Topological insulator properties of photonic kagome helical waveguide arrays
title_full Topological insulator properties of photonic kagome helical waveguide arrays
title_fullStr Topological insulator properties of photonic kagome helical waveguide arrays
title_full_unstemmed Topological insulator properties of photonic kagome helical waveguide arrays
title_sort topological insulator properties of photonic kagome helical waveguide arrays
publisher Elsevier
series Results in Physics
issn 2211-3797
publishDate 2019-03-01
description 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: Kagome lattice, Topological insulator, Edge state
url http://www.sciencedirect.com/science/article/pii/S2211379718330274
work_keys_str_mv AT huazhong topologicalinsulatorpropertiesofphotonickagomehelicalwaveguidearrays
AT rongwang topologicalinsulatorpropertiesofphotonickagomehelicalwaveguidearrays
AT fangweiye topologicalinsulatorpropertiesofphotonickagomehelicalwaveguidearrays
AT jingwenzhang topologicalinsulatorpropertiesofphotonickagomehelicalwaveguidearrays
AT leizhang topologicalinsulatorpropertiesofphotonickagomehelicalwaveguidearrays
AT yanpengzhang topologicalinsulatorpropertiesofphotonickagomehelicalwaveguidearrays
AT milivojrbelic topologicalinsulatorpropertiesofphotonickagomehelicalwaveguidearrays
AT yiqizhang topologicalinsulatorpropertiesofphotonickagomehelicalwaveguidearrays
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