IDEAS home Printed from https://ideas.repec.org/a/eee/chsofr/v197y2025ics0960077925004485.html
   My bibliography  Save this article

Topological linear and nonlinear gap modes in defected dimer lattice with fourth-order diffraction

Author

Listed:
  • Wang, Xiaoyang
  • Fu, Qidong
  • Huang, Changming

Abstract

In this study, we investigate the optical properties of linear and nonlinear topological in-phase, out-of-phase, and edge modes in a defected dimer lattice with fourth-order diffraction, encompassing their bifurcation characteristics, localized field distributions, and stability properties. Both focusing and defocusing nonlinearities are considered. Within the nontrivial regime, in-phase, out-of-phase, and edge modes can emerge within the gap. Numerical results reveal that three types of topological gap solitons bifurcate from their corresponding linear localized modes. The dimerization parameter can be tuned to drive the system from a trivial to a nontrivial configuration. We observe that as the strength of the fourth-order diffraction increases, the size of the spectral gap also enlarges, with this parameter effectively broadening the stability window for solitons. Our findings offer novel insights into the properties of both linear and nonlinear modes in topologically defected structures.

Suggested Citation

  • Wang, Xiaoyang & Fu, Qidong & Huang, Changming, 2025. "Topological linear and nonlinear gap modes in defected dimer lattice with fourth-order diffraction," Chaos, Solitons & Fractals, Elsevier, vol. 197(C).
    • Handle: RePEc:eee:chsofr:v:197:y:2025:i:c:s0960077925004485
    DOI: 10.1016/j.chaos.2025.116435
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960077925004485
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.chaos.2025.116435?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:chsofr:v:197:y:2025:i:c:s0960077925004485. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Thayer, Thomas R. (email available below). General contact details of provider: https://www.journals.elsevier.com/chaos-solitons-and-fractals .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.