Refractive and Meta-optics Hybrid System

Guang Yan Liu, Wei Lun Hsu, Jui Wen Pan, Chih Ming Wang

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Current metalenses with large numerical apertures suffer from low efficiency. In this paper, we demonstrate a refractive-meta hybrid system consisting of a ball lens mainly providing the ray bending ability, and a meta-corrector to eliminate aberration of the optical system. Spatial frequency requirement of the meta-device is significantly reduced since system ray bending ability is mainly provided by refractive element. As a result, a large pixel liquid crystal spatial light modulator is sufficient to demonstrate the concept of meta-corrector for the refractive-meta hybrid system with a numerical aperture of 0.52. It is shown that the focal spot size can be significantly reduced from 322.07 m to 0.636 m for ray-tracing simulation, and 101.6 m to 7.7 m for measurement, as an appropriate phase distribution of the meta-corrector is added. We believe this pilot experiment can be applied to ball lenses and other optical lens-sets like cookie triplets as well.

Original languageEnglish
Pages (from-to)6880-6885
Number of pages6
JournalJournal of Lightwave Technology
Volume39
Issue number21
DOIs
StatePublished - Nov 2021

Keywords

  • aberration
  • Diffraction
  • Lenses
  • Meta-corrector
  • Metasurfaces
  • Nonlinear optics
  • Optical device fabrication
  • Optical modulation
  • Optical refraction
  • refractive-meta hybrid system
  • SLM

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