GaN Metalens for Pixel-Level Full-Color Routing at Visible Light

B.H. Chen, P.C. Wu, V.-C. Su, Y.-C. Lai, C.H. Chu, I.C. Lee, J.-W. Chen, Y.H. Chen, Y.-C. Lan, C.-H. Kuan, Din-ping Tsai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

194 Citations (Scopus)

Abstract

© 2017 American Chemical Society.Metasurface-based components are known to be one of the promising candidates for developing flat optical systems. However, their low working efficiency highly limits the use of such flat components for feasible applications. Although the introduction of the metallic mirror has been demonstrated to successfully enhance the efficiency, it is still somehow limited for imaging and sensing applications because they are only available for devices operating in a reflection fashion. Here, we demonstrate three individual GaN-based metalenses working in a transmission window with extremely high operation efficiency at visible light (87%, 91.6%, and 50.6% for blue, green, and red light, respectively). For the proof of concept, a multiplex color router with dielectric metalens, which is capable of guiding individual primary colors into different spatial positions, is experimentally verified based on the design of out-of-plane focusing metalens. Our approach with low-cost, semiconductor fabrication compatibility and high working efficiency characteristics offers a way for establishing a complete set of flat optical components for a wide range of applications such as compact imaging sensors, optical spectroscopy, and high-resolution lithography, just named a few.
Original languageEnglish
Pages (from-to)6345-6352
Number of pages8
JournalNano Letters
Volume17
Issue number10
DOIs
Publication statusPublished - 11 Oct 2017
Externally publishedYes

Keywords

  • GaN nanopillars
  • image sensor
  • metalens
  • Pancharatnam-Berry phase method
  • Visible metasurfaces

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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