An ultrabroadband 3D achromatic metalens

Fatih Balli, Mansoor A. Sultan, Aytekin Ozdemir, Jeffrey Todd Hastings

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

We design and fabricate ultra-broadband achromatic metalenses operating from the visible into the shortwave infrared, 450–1700 nm, with diffraction-limited performance. A hybrid 3D architecture, which combines nanoholes with a phase plate, allows realization in low refractive index materials. As a result, two-photon lithography can be used for prototyping while molding can be used for mass production. Experimentally, a 0.27 numerical aperture (NA) metalens exhibits 60% average focusing efficiency and 6% maximum focal length error over the entire bandwidth. In addition, a 200 μm diameter, 0.04 NA metalens was used to demonstrate achromatic imaging over the same broad spectral range. These results show that 3D metalens architectures yield excellent performance even using low-refractive index materials, and that two-photon lithography can produce metalenses operating at visible wavelengths.

Original languageEnglish
Pages (from-to)1259-1264
Number of pages6
JournalNanophotonics
Volume10
Issue number2
DOIs
StatePublished - Jan 1 2021

Bibliographical note

Publisher Copyright:
© 2021 Fatih Balli et al., published by De Gruyter.

Keywords

  • Achromat
  • Metalens
  • Nanohole
  • Two-photon lithography

ASJC Scopus subject areas

  • Biotechnology
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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