Second-Harmonic Enhancement from a Nonlinear Plasmonic Metasurface Coupled to an Optical Waveguide

Tsafrir Abir*, Mai Tal, Tal Ellenbogen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Metasurfaces are commonly constructed from two-dimensional arrangements of nanoresonators. Coherent coupling of the nanoresonators through extended photonic modes of the metasurface results in a modified collective optical response, and enhances light-matter interactions. Here we experimentally demonstrate that strong collective resonances can arise also from coupling the metasurface to an optical waveguide. We explore the effect this waveguide-Assisted collective interaction has on second-harmonic generation from the hybrid system. Our measurements indicate an enhancement factor of 8 for the transmitted second harmonic in comparison to incoherent collective scattering. In addition, complementary simulations predict about a 100-fold enhancement for the second harmonic that remains confined inside the waveguide. The ability to control the hybrid modes by the waveguide's design provides broader control over the formation of the collective interaction and new tools to tailor the nonlinear interactions. Our findings pave a promising direction to realize nonlinear photonic circuits with metasurfaces.

Original languageEnglish
Pages (from-to)2712-2717
Number of pages6
JournalNano Letters
Issue number7
StatePublished - 13 Apr 2022


  • Collective scattering
  • Guided lattice resonance
  • Guided-mode resonance
  • Metasurface
  • Nonlinear
  • Waveguide


Dive into the research topics of 'Second-Harmonic Enhancement from a Nonlinear Plasmonic Metasurface Coupled to an Optical Waveguide'. Together they form a unique fingerprint.

Cite this