Controlling propagation and coupling of waveguide modes using phase-gradient metasurfaces

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Zhaoyi Li
  • Myoung-Hwan Kim
  • Zhaohong Han
  • Sajan Shrestha
  • Adam Christopher Overvig
  • Ming Lu
  • Aaron Stein
  • Anuradha Murthy Agarwal
  • Marko Lončar
  • Nanfang Yu

Detail(s)

Original languageEnglish
Pages (from-to)675-683
Journal / PublicationNature Nanotechnology
Volume12
Issue number7
Online published17 Apr 2017
Publication statusPublished - Jul 2017
Externally publishedYes

Abstract

Research on two-dimensional designer optical structures, or metasurfaces, has mainly focused on controlling the wavefronts of light propagating in free space. Here, we show that gradient metasurface structures consisting of phased arrays of plasmonic or dielectric nanoantennas can be used to control guided waves via strong optical scattering at subwavelength intervals. Based on this design principle, we experimentally demonstrate waveguide mode converters, polarization rotators and waveguide devices supporting asymmetric optical power transmission. We also demonstrate all-dielectric on-chip polarization rotators based on phased arrays of Mie resonators with negligible insertion losses. Our gradient metasurfaces can enable small-footprint, broadband and low-loss photonic integrated devices.

Citation Format(s)

Controlling propagation and coupling of waveguide modes using phase-gradient metasurfaces. / Li, Zhaoyi; Kim, Myoung-Hwan; Wang, Cheng; Han, Zhaohong; Shrestha, Sajan; Overvig, Adam Christopher; Lu, Ming; Stein, Aaron; Agarwal, Anuradha Murthy; Lončar, Marko; Yu, Nanfang.

In: Nature Nanotechnology, Vol. 12, No. 7, 07.2017, p. 675-683.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal