• Chinese Optics Letters
  • Vol. 20, Issue 6, 061301 (2022)
Xiaoxue Li1, Guanghao Rui1, Yiping Cui1, and Bing Gu1、2、*
Author Affiliations
  • 1Advanced Photonics Center, Southeast University, Nanjing 210096, China
  • 2Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China
  • show less
    DOI: 10.3788/COL202220.061301 Cite this Article Set citation alerts
    Xiaoxue Li, Guanghao Rui, Yiping Cui, Bing Gu. Reconfigurable nested photonic topological loops[J]. Chinese Optics Letters, 2022, 20(6): 061301 Copy Citation Text show less

    Abstract

    Photonic structures with topological edge states and resonance loops are both important in optical communication systems, but they are usually two separate structures. In order to obtain a photonic system combining properties from both, we design multiple-layer nested photonic topological structures. The nested topological loops not only have topological protection immune to structural disorder and defects, but also possess both the properties of unidirectional propagation and loop resonance. Through mode analysis and simulations, we find that the transport can form diverse circulation loops. Each loop has its own resonance frequencies and can be solely excited in the nested layered structure through choosing its resonance frequencies. As a result, this work shows great application prospects in the area of reconfigurable photonic circuits.
    H(k)=H0+H,

    View in Article

    Hij=Mij+αMiαMαjεiεα,i,j=1,2,3,4,

    View in Article

    H(k)=[H+00H],

    View in Article

    C±=±12[sgn(M)+sgn(B)].

    View in Article

    Xiaoxue Li, Guanghao Rui, Yiping Cui, Bing Gu. Reconfigurable nested photonic topological loops[J]. Chinese Optics Letters, 2022, 20(6): 061301
    Download Citation