A broadband achromatic metalens in the visible

Shuming Wang, Pin Chieh Wu, Vin Cent Su, Yi Chieh Lai, Mu Ku Chen, Hsin Yu Kuo, Bo Han Chen, Yu Han Chen, Tzu Ting Huang, Jung Hsi Wang, Ray Ming Lin, Chieh Hsiung Kuan, Tao Li, Zhenlin Wang, Shining Zhu, Din Ping Tsai

Research output: Contribution to journalArticle

275 Citations (Scopus)

Abstract

Metalenses consist of an array of optical nanoantennas on a surface capable of manipulating the properties of an incoming light wavefront. Various flat optical components, such as polarizers, optical imaging encoders, tunable phase modulators and a retroreflector, have been demonstrated using a metalens design. An open issue, especially problematic for colour imaging and display applications, is the correction of chromatic aberration, an intrinsic effect originating from the specific resonance and limited working bandwidth of each nanoantenna. As a result, no metalens has demonstrated full-colour imaging in the visible wavelength. Here, we show a design and fabrication that consists of GaN-based integrated-resonant unit elements to achieve an achromatic metalens operating in the entire visible region in transmission mode. The focal length of our metalenses remains unchanged as the incident wavelength is varied from 400 to 660 nm, demonstrating complete elimination of chromatic aberration at about 49% bandwidth of the central working wavelength. The average efficiency of a metalens with a numerical aperture of 0.106 is about 40% over the whole visible spectrum. We also show some examples of full-colour imaging based on this design.

Original languageEnglish
Pages (from-to)227-232
Number of pages6
JournalNature Nanotechnology
Volume13
Issue number3
DOIs
Publication statusPublished - 2018 Mar 1

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Wang, S., Wu, P. C., Su, V. C., Lai, Y. C., Chen, M. K., Kuo, H. Y., Chen, B. H., Chen, Y. H., Huang, T. T., Wang, J. H., Lin, R. M., Kuan, C. H., Li, T., Wang, Z., Zhu, S., & Tsai, D. P. (2018). A broadband achromatic metalens in the visible. Nature Nanotechnology, 13(3), 227-232. https://doi.org/10.1038/s41565-017-0052-4