Nonlinear Diatomic Metasurface for Real and Fourier Space Image Encoding

Ningbin Mao, Junhong Deng, Xuecai Zhang, Yutao Tang, Mingke Jin, Yang Li, Xuan Liu, Kingfai Li, Tun Cao, Kok Wai CHEAH, Hong Wang, Tsz Fai Jack NG, Guixin LI*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

34 Citations (Scopus)


In linear optics, the metasurface represents an ideal platform for encoding optical information because of its unprecedented abilities of manipulating the intensity, polarization, and phase of light wave with subwavelength meta-atoms. However, controlling various degrees of freedom of light in nonlinear optics remains elusive. Here, we propose a nonlinear plasmonic metasurface working in the near-infrared regime that can simultaneously encode optical images in the real and Fourier spaces. This is achieved by designing a diatomic meta-molecule, which enables the independent control of the nonlinear geometric phase, polarization, and intensity of second harmonic waves. The proposed nonlinear diatomic metasurface provides an ultracompact platform for implementing multidimensional optical information encoding and may hold great potential in optical information security and optical anticounterfeiting.

Original languageEnglish
Pages (from-to)7463-7468
Number of pages6
JournalNano Letters
Issue number10
Publication statusPublished - 14 Oct 2020

Scopus Subject Areas

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

User-Defined Keywords

  • holography
  • nonlinear metasurfaces
  • optical metasurfaces
  • plasmonics


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