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Topology optimization of phoxonic crystals for maximizing dual bandgaps using GA-SIMP method

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Bin Li
  • S. S. Nanthakumar
  • Yan Pennec
  • Bahram Djafari-Rouhani
  • Xiaoying Zhuang

Research Organisations

External Research Organisations

  • Lille 1 University of Science and Technology

Details

Original languageEnglish
Article number110359
JournalInternational Journal of Mechanical Sciences
Volume300
Early online date26 May 2025
Publication statusE-pub ahead of print - 26 May 2025

Abstract

Phoxonic crystals are photonic-phononic or optomechanical periodic structures that simultaneously exhibit dual bandgaps. This allows for the confinement of both optical and elastic waves in cavities and waveguides, providing a powerful platform for novel optomechanical devices and systems. The opening of dual bandgaps is crucial to these potential applications. Topology optimization offers maximum freedom in the dual bandgap structure design, however, relevant research is limited. We propose a two-stage algorithm to maximize the dual bandgaps, where a genetic algorithm is used to find the initial design, and then the SIMP method is employed to obtain the optimal solution. This GA-SIMP hybrid approach capitalizes on the global search capability of GA to explore the design space and identify potential configurations, while harnessing the computational efficiency and precision of SIMP to refine and converge to high-quality solutions. This strategy effectively balances global exploration with local refinement, addressing the trade-off challenges in dual bandgap optimization for phoxonic crystals. We demonstrate the design capability of the coupled methodology by opening bandgaps between different bands in the numerical examples, and the optimized structures show intermediate states between interconnected and mutually independent configurations.

Keywords

    Bandgap, Multi-objective optimization, NSGA-II, Phoxonic crystals, SIMP, Topology optimization

ASJC Scopus subject areas

Cite this

Topology optimization of phoxonic crystals for maximizing dual bandgaps using GA-SIMP method. / Li, Bin; Nanthakumar, S. S.; Pennec, Yan et al.
In: International Journal of Mechanical Sciences, Vol. 300, 110359, 15.08.2025.

Research output: Contribution to journalArticleResearchpeer review

Li, B., Nanthakumar, S. S., Pennec, Y., Djafari-Rouhani, B., & Zhuang, X. (2025). Topology optimization of phoxonic crystals for maximizing dual bandgaps using GA-SIMP method. International Journal of Mechanical Sciences, 300, Article 110359. Advance online publication. https://doi.org/10.1016/j.ijmecsci.2025.110359
Li B, Nanthakumar SS, Pennec Y, Djafari-Rouhani B, Zhuang X. Topology optimization of phoxonic crystals for maximizing dual bandgaps using GA-SIMP method. International Journal of Mechanical Sciences. 2025 Aug 15;300:110359. Epub 2025 May 26. doi: 10.1016/j.ijmecsci.2025.110359
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