Inverse-designed all-dielectric waveguide bend

F. Callewaert, Koray Aydin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Silicon photonics is a fast growing technology for high bandwidth optical communications. Bandwidth can be strongly enhanced with the use of multimode systems, but integrated photonics still has to operate in the single-mode regime. Indeed, most multi-mode photonic devices such as waveguide bends cannot preserve the integrity of the modes. Here we present an alternative inverse-design method to design an ultra-compact multimode waveguide bend. The convergence and performance of the algorithm are studied, along with a transform method that allows to design devices made of two materials only. The optimal device is studied with full electromagnetic simulations to compare its behavior with a more traditional circular waveguide bend. A broadband transmission with very low intermodal coupling is achieved. This illustrates the potential of the objective-first inverse-design method to design ultra-compact broadband photonic devices.

Original languageEnglish (US)
Title of host publicationNovel Optical Systems Design and Optimization XIX
ISBN (Electronic)9781510602878
StatePublished - Jan 1 2016
Event19th Annual Conference for Novel Optical Systems Design and Optimization - San Diego, United States
Duration: Aug 29 2016Aug 30 2016


Other19th Annual Conference for Novel Optical Systems Design and Optimization
Country/TerritoryUnited States
CitySan Diego


  • Multimode Waveguide Bends
  • Objective-first inverse-design
  • Silicon Photonics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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