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Freeform Mode-Engineered Metasurfaces.

Zhongjun Jiang1, Tianxiang Dai2, Shuwei Guo3

  • 1Department of Physics and Optical Science, University of North Carolina, Charlotte, North Carolina 28223, United States.

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|March 10, 2026
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Summary
This summary is machine-generated.

We developed a new inverse design framework for nanophotonic devices, enabling precise control over light-matter interactions and the creation of novel nonlocal metasurfaces for advanced applications.

Keywords:
Mie resonancechiralityhigh-Q nanophotonicsnonlocal metasurfacestopology optimization

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Area of Science:

  • Nanophotonics
  • Optical Metasurfaces
  • Light-Matter Interactions

Background:

  • Current optical mode engineering is heuristic and limited for complex nanophotonic structures.
  • Tailoring light-matter interactions is crucial for nanophotonic technologies.

Purpose of the Study:

  • To introduce an inverse design framework for optimizing near-field distributions in dielectric nanophotonic structures.
  • To discover new classes of nonlocal metasurfaces with tailored modal properties.

Main Methods:

  • Developed an inverse design framework optimizing near-field distributions.
  • Applied the framework to engineer Mie-type modes in dielectric nanophotonic structures.
  • Generalized the framework for higher-order and multifunctional mode engineering.

Main Results:

  • Discovered new classes of freeform nonlocal metasurfaces.
  • Demonstrated optimization of metasurfaces for specific illumination, modal properties, and quality factors.
  • Experimentally realized multiwavelength and chiral nonlocal metasurfaces.

Conclusions:

  • The versatile framework enables freeform mode engineering for high-quality-factor nanophotonic platforms.
  • Applications include sensing, nonlinear optics, optomechanics, and quantum information processing.
  • This approach overcomes limitations of heuristic methods in optical mode engineering.