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Dual-disorder engineered optical localization in nonlinear synthetic mesh lattices

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  • Wen, Zengrun
  • Zhang, Qinqin
  • Cao, Xuefei
  • Qi, Congge
  • Gao, Yuanmei

Abstract

Anderson localization and nonlinearity are two ways to achieve optical localization, while their interactions are still absent in synthetic mesh lattices (SMLs) that enable the description of discrete quantum walks and light propagations. Here, we randomly change the longitudinal phases and transverse coupling coefficients to realize phase and coupling disorders in the SMLs, respectively. The effects of phase disorder, coupling disorder, and their combinations on optical localization are studied when the nonlinearity is considered. Our study indicates that in the nonlinear SMLs, the localization behavior induced by independently tuning either coupling disorder or phase disorder undergoes delocalization first and transitions to localization later on. For the hybrid disorder modulations, the disorder strengths enable a tunable transition between localization and delocalization states. Additionally, the change in the degree of nonlinearity has a non-monotonic impact on localization in these disordered systems. This research expands the study of optical localization in nonlinear systems and the design of photonic devices.

Suggested Citation

  • Wen, Zengrun & Zhang, Qinqin & Cao, Xuefei & Qi, Congge & Gao, Yuanmei, 2026. "Dual-disorder engineered optical localization in nonlinear synthetic mesh lattices," Chaos, Solitons & Fractals, Elsevier, vol. 204(C).
    • Handle: RePEc:eee:chsofr:v:204:y:2026:i:c:s0960077925018181
    DOI: 10.1016/j.chaos.2025.117804
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