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Related Experiment Video

Updated: Feb 24, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

Wavevector-Selective Nonlinear Plasmonic Metasurfaces.

Kuang-Yu Yang¹, Ruggero Verre², Jérémy Butet¹

¹Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL) , 1015 Lausanne, Switzerland.

|August 23, 2017

Summary

This summary is machine-generated.

We demonstrated that plasmonic metasurfaces with tilted gold nanopillars act as wavevector-selective nonlinear optical components. Their nonlinear response strongly depends on the angle of incidence, enabling directional nonlinear mirrors.

Keywords:

Metamaterials directionality nonlinear optical material nonlinear plasmonics second harmonic generation

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Last Updated: Feb 24, 2026

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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

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Published on: November 21, 2019

Area of Science:

Photonics and Optics
Materials Science
Nonlinear Optics

Background:

Electromagnetic metasurfaces offer novel functionalities for ultrathin optical components.
Strong nonlinear responses and angular selectivity are key for advanced optical designs.
Plasmonic metasurfaces provide a versatile platform for manipulating light-matter interactions.

Purpose of the Study:

To investigate optical second harmonic generation (SHG) from plasmonic metasurfaces.
To explore the wavevector-selective nonlinear response of metasurfaces with tilted nanopillars.
To demonstrate the potential for designing directional nonlinear optical devices.

Main Methods:

Fabrication of plasmonic metasurfaces composed of aligned gold nanopillars with an out-of-plane tilt.
Utilized a flexible nonlinear Fourier microscope for experimental investigation.
Performed computational modeling to analyze the nonlinear optical response.

Main Results:

The metasurfaces exhibit wavevector-selective nonlinear behavior, with SHG dependent on excitation beam polarization, wavelength, and incidence direction.
A significant variation (nearly two orders of magnitude) in nonlinear response was observed by altering the incidence angle.
The metasurfaces function as directional nonlinear mirrors.

Conclusions:

Tilted plasmonic metasurfaces act as efficient wavevector-selective nonlinear optical elements.
The angular dependence of the nonlinear response opens new possibilities for directional optical control.
These findings pave the way for novel directional meta-mirrors in the nonlinear optical regime.