Achromatic metalens array for full-colour light-field imaging

Ren Jie Lin, Vin Cent Su, Shuming Wang, Mu Ku Chen, Tsung Lin Chung, Yu Han Chen, Hsin Yu Kuo, Jia Wern Chen, Ji Chen, Yi Teng Huang, Jung Hsi Wang, Cheng Hung Chu, Pin Chieh Wu, Tao Li, Zhenlin Wang, Shining Zhu, Din Ping Tsai

Research output: Contribution to journalLetterpeer-review

189 Citations (Scopus)


A light-field camera captures both the intensity and the direction of incoming light1–5. This enables a user to refocus pictures and afterwards reconstruct information on the depth of field. Research on light-field imaging can be divided into two components: acquisition and rendering. Microlens arrays have been used for acquisition, but obtaining broadband achromatic images with no spherical aberration remains challenging. Here, we describe a metalens array made of gallium nitride (GaN) nanoantennas6 that can be used to capture light-field information and demonstrate a full-colour light-field camera devoid of chromatic aberration. The metalens array contains an array of 60 × 60 metalenses with diameters of 21.65 μm. The camera has a diffraction-limited resolution of 1.95 μm under white light illumination. The depth of every object in the scene can be reconstructed slice by slice from a series of rendered images with different depths of focus. Full-colour, achromatic light-field cameras could find applications in a variety of fields such as robotic vision, self-driving vehicles and virtual and augmented reality.

Original languageEnglish
Pages (from-to)227-231
Number of pages5
JournalNature Nanotechnology
Issue number3
Publication statusPublished - 2019 Mar 1

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


Dive into the research topics of 'Achromatic metalens array for full-colour light-field imaging'. Together they form a unique fingerprint.

Cite this