Metasurface Device with Helicity-Dependent Functionality

Dandan Wen, Shumei Chen, Fuyong Yue, Kinlong Chan, Ming Chen, Marcus Ardron, King Fai Li, Polis Wing Han Wong, Kok Wai CHEAH, Edwin Yue Bun Pun, Guixin LI*, Shuang Zhang, Xianzhong Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Citations (Scopus)

Abstract

Driven by miniaturization and system integration, ultrathin, multifunction optical elements are urgently needed. Traditional polarization-selective optical elements are mainly based on birefringence, which is realized by using the well-designed structure of each phase pixel. However, further reduction of the pixel size and improvement of the phase levels are hindered by the complicated fabrication process. An approach is proposed to realize a metasurface device that possesses two distinct functionalities. The designed metasurface device, consisting of gold nanorods with spatially varying orientation, has been experimentally demonstrated to function as either a lens or a hologram, depending on the helicity of the incident light. As the phase of the scattered light is controlled by the orientation of the nanorods, arbitrary phase levels and dispersionless phase profile can be realized through a much simpler fabrication process than the conventional device. This approach provides an unconventional alternative to realize multifunction optical element, dramatically increasing the functionality density of the optical systems.

Original languageEnglish
Pages (from-to)321-327
Number of pages7
JournalAdvanced Optical Materials
Volume4
Issue number2
DOIs
Publication statusPublished - 1 Feb 2016

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

User-Defined Keywords

  • Helicity-dependent functionality
  • Hologram
  • Lens
  • Metasurface
  • Ultrathin multifunction devices

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