Inverse Design and 3D Printing of a Metalens on an Optical Fiber Tip for Direct Laser Lithography

Wisnu Hadibrata, Heming Wei, Sridhar Krishnaswamy, Koray Aydin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


An inverse-designed metalens is proposed, designed, and fabricated on an optical fiber tip via a 3D direct laser-writing technique through two-photon polymerization. A computational inverse-design method based on an objective-first algorithm was used to design a thin circular grating-like structure to transform the parallel wavefront into a spherical wavefront at the near-infrared range. With a focal length about 8 μm at an operating wavelength of 980 nm and an optimized focal spot at the scale of 100 nm, our proposed metalens platform is suitable for two-photon direct laser lithography. We demonstrate the use of the fabricated metalens in a direct laser lithography system. The proposed platform, which combines the 3D printing technique and the computational inverse-design method, shows great promise for the fabrication and integration of multiscale and multiple photonic devices with complex functionalities.

Original languageEnglish (US)
Pages (from-to)2422-2428
Number of pages7
JournalNano letters
Issue number6
StatePublished - Mar 24 2021


  • Direct laser lithography
  • Fiber tip
  • Inverse design
  • Metalens
  • Two-photon polymerization

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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