Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Continuous-phase Lens Design via Binary Dielectric Annular Nanoslits

  • Woongbu Na (Electrical and Electronic Convergence Department, Hongik University) ;
  • Seung-Yeol Lee (School of Electrical and Electronic Engineering, Kyungpook National University) ;
  • Hyuntai Kim (Electrical and Electronic Convergence Department, Hongik University)
  • Received : 2023.02.10
  • Accepted : 2023.04.12
  • Published : 2023.06.25
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Abstract

In this study, a binary dielectric annular nanoring lens is proposed to cover the full range of optical phase. The lens is designed numerically, based on the effective-medium theory. The performance of the proposed lens is verified for the cases of single-focal and dual-focal lenses. The efficiency of a single-focal lens is improved by 17.19% compared to a binary dielectric lens, and that of a dual-focal lens shows enhancements of 13.11% and 49.41% at the two focal points. This lens design can be applied to other optical components with axially symmetric structures.

Keywords

Acknowledgement

National Research Foundation of Korea (NRF) (2021R1F1A1052193, 2022R1F1A1062278); 2023 Hongik University Research Fund.

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