Topological photonic crystal of large valley Chern numbers

被引:43
作者
Xi, Xiang [1 ]
Ye, Kang-Ping [1 ]
Wu, Rui-Xin [1 ]
机构
[1] Nanjing Univ, Sch Elect Sci & Engn, Nanjing 200023, Peoples R China
基金
中国国家自然科学基金;
关键词
SPIN;
D O I
10.1364/PRJ.396872
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The recent realizations of a topological valley phase in a photonic crystal, an analog of gapped valleytronic materials in an electronic system, are limited to the valley Chem number of one. In this paper, we present a type of valley phase that can have a large valley Chern number of two or three. The valley phase transitions between the different valley Chern numbers (from one to three) are realized by changing the configuration of the unit cell. We demonstrate that these topological phases can guide the wave propagation robustly along a sharply bent domain wall. We believe our results are promising for the exploration of new topological phenomena in photonic systems. (C) 2020 Chinese Laser Press
引用
收藏
页码:B1 / B7
页数:7
相关论文
共 41 条
  • [1] Two-dimensionally confined topological edge states in photonic crystals
    Barik, Sabyasachi
    Miyake, Hirokazu
    DeGottardi, Wade
    Waks, Edo
    Hafezi, Mohammad
    [J]. NEW JOURNAL OF PHYSICS, 2016, 18
  • [2] Valley-Hall Photonic Topological Insulators with Dual-Band Kink States
    Chen, Qiaolu
    Zhang, Li
    He, Mengjia
    Wang, Zuojia
    Lin, Xiao
    Gao, Fei
    Yang, Yihao
    Zhang, Baile
    Chen, Hongsheng
    [J]. ADVANCED OPTICAL MATERIALS, 2019, 7 (15)
  • [3] Tunable Electromagnetic Flow Control in Valley Photonic Crystal Waveguides
    Chen, Xiao-Dong
    Shi, Fu-Long
    Liu, Huan
    Lu, Jin-Cheng
    Deng, Wei-Min
    Dai, Jun-Yan
    Cheng, Qiang
    Dong, Jian-Wen
    [J]. PHYSICAL REVIEW APPLIED, 2018, 10 (04):
  • [4] Valley-contrasting physics in all-dielectric photonic crystals: Orbital angular momentum and topological propagation
    Chen, Xiao-Dong
    Zhao, Fu-Li
    Chen, Min
    Dong, Jian-Wen
    [J]. PHYSICAL REVIEW B, 2017, 96 (02)
  • [5] Multiple topological phase transitions in a gyromagnetic photonic crystal
    Chen, Ze-Guo
    Mei, Jun
    Sun, Xiao-Cheng
    Zhang, Xiujuan
    Zhao, Jiajun
    Wu, Ying
    [J]. PHYSICAL REVIEW A, 2017, 95 (04)
  • [6] Topological Insulators by Topology Optimization
    Christiansen, Rasmus E.
    Wang, Fengwen
    Sigmund, Ole
    [J]. PHYSICAL REVIEW LETTERS, 2019, 122 (23)
  • [7] Dong JW, 2017, NAT MATER, V16, P298, DOI [10.1038/NMAT4807, 10.1038/nmat4807]
  • [8] Chern numbers in discretized Brillouin zone: Efficient method of computing (spin) Hall conductances
    Fukui, T
    Hatsugai, Y
    Suzuki, H
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2005, 74 (06) : 1674 - 1677
  • [9] Gao F, 2018, NAT PHYS, V14, P140, DOI [10.1038/nphys4304, 10.1038/NPHYS4304]
  • [10] Valley surface-wave photonic crystal and its bulk/edge transport
    Gao, Zhen
    Yang, Zhaoju
    Gao, Fei
    Xue, Haoran
    Yang, Yahui
    Dong, Jianwen
    Zhang, Baile
    [J]. PHYSICAL REVIEW B, 2017, 96 (20)