Enhanced optical performance of multifocal metalens with conic shapes

Yanjun Bao; Qiao Jiang; Yimin Kang; Xing Zhu; Zheyu Fang

doi:10.1038/lsa.2017.71

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Enhanced optical performance of multifocal metalens with conic shapes

Original Articles

- Enhanced optical performance of multifocal metalens with conic shapes
- Light: Science & Applications Vol. 6, Issue 4, (2017)
- Affiliations：
  
  School of Physics, State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China
- Author bio：
  
  Z Fang, Email: zhyfang@pku.edu.cn
- Funds：
- DOI：10.1038/lsa.2017.71
  CLC：
- Published：2017-12，
  
  Published Online：20 April 2017，
  
  Received：23 December 2016，
  
  Revised：13 April 2017，
  
  Accepted：18 April 2017
- Accepted：
Scan QR Code
Bao, Y. J. et al. Enhanced optical performance of multifocal metalens with conic shapes. Light: Science & Applications, 6, e17071 (2017).
DOI：

Bao, Y. J. et al. Enhanced optical performance of multifocal metalens with conic shapes. Light: Science & Applications, 6, e17071 (2017). DOI： 10.1038/lsa.2017.71.

摘要

Abstract

A multifocal metalens

which focuses incident light at multiple foci

has many applications in imaging systems and optical communications. However

the traditional design strategy of a multifocal metalens combines several lenses that have different focal points into a planar integrated unit

resulting in low imaging quality because of the high background noise. Here we show that the defects of the traditional method can be overcome by designing a metalens with conic shapes (the ellipse and the hyperbola); this approach could improve the imaging performance and substantially decrease the background noise of multifocal metalenses. These benefits arise from the intrinsic properties of the two conic curves

which can focus incident light constructively at all of the foci of the metalens. We further demonstrate that the proposed conic-shaped metalens can function well within a broadband operation wavelength that ranges from 600 to 900 nm with the dual polarity actively controlled by the incident circular polarized light. The great agreement between the experimental and simulation results demonstrates that our proposed metalens has significant potential for use in future integrated nanophotonic devices.

关键词

Keywords

conic shapemetasurfacemultifocal metalensoptical performance

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