Photonic cavity design by topology optimization

Rasmus E. Christiansen*, Fengwen Wang, Jesper Mørk, Ole Sigmund

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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This study considers a recently proposed topology optimization based approach for designing photonic membrane cavities supporting a dipole cavity mode. Foremost, the study demonstrates that the approach is robust towards the choice of initial guess provided for the optimization problem, in the sense that near identical final designs are obtained for vastly different initial guesses. This finding suggests that the final designs are near-optimal under the given design constraints. Secondarily, by stopping the design procedure after the same fixed number of design iterations for all initial guesses, it shows that the designed photonic cavity is sensitive towards certain small perturbations of their geometry, stressing the need for utilizing robust optimization techniques and imposing fabrication conforming length-scales in the cavity geometries.
Original languageEnglish
Title of host publicationProceedings of SPIE - Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVI
EditorsBalaji Panchapakesan, André-Jean Attias
Number of pages7
PublisherSPIE - International Society for Optical Engineering
Publication date2019
Article number110890A
Publication statusPublished - 2019
EventSPIE Nanoscience + Engineering 2019 - San Diego, United States
Duration: 11 Aug 201915 Aug 2019


ConferenceSPIE Nanoscience + Engineering 2019
CountryUnited States
CitySan Diego
SeriesProceedings of SPIE, the International Society for Optical Engineering


  • Purcell factor
  • Cavities
  • Quality factor
  • Resonators
  • Manufacturing resolution
  • Topology optimization
  • Inverse problems

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