Silicon metasurfaces for third harmonic geometric phase manipulation and multiplexed holography

Abstract

Nonlinear wavefront control is a crucial requirement in realizing nonlinear optical applications with metasurfaces. Numerous aspects of nonlinear frequency conversion and wavefront control have been demonstrated for plasmonic metasurfaces. However, several disadvantages limit their applicability in nonlinear nanophotonics, including high dissipative loss and low optical damage threshold. In contrast, it has been shown that metasurfaces made of high-index dielectrics can provide strong nonlinear responses. Regardless of the recent progress in nonlinear optical processes using all-dielectric nanostructures and metasurfaces, much less advancement has been made in realizing a full wavefront control directly with the generation process. Here, we demonstrate the nonlinear wavefront control for the third-harmonic generation with a silicon metasurface. We use a Pancharatnam-Berry phase approach to encode phase gradients and holographic images on nanostructured silicon metasurfaces. We experimentally demonstrate the polarization-dependent wavefront control and the reconstruction of an encoded hologram at the third-harmonic wavelength with high fidelity. Further, we show that holographic multiplexing is possible by utilizing the polarization states of the third harmonic generation. Our approach eases design and fabrication processes and paves the way to an easy to use toolbox for nonlinear optical wavefront control with all-dielectric metasurfaces.

References in corpus (5)

• Giant nonlinear response at the nanoscale driven by bound states in the continuum
• An optical metamixer
• Monolithic AlGaAs second-harmonic nanoantennas
• Symmetry selective third harmonic generation from plasmonic metacrystals
• Imaging through nonlinear metalens using second harmonic generation

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• All-optical free-space routing of upconverted light by metasurfaces via nonlinear interferometry
• Efficient frequency conversion with geometric phase control in optical metasurfaces
• Nonlinear dielectric geometric-phase metasurface with simultaneous structure and lattice symmetry design
• Toward universal transformations of orbital angular momentum of a single photon
• Photo-Thermally Tunable Photon-Pair Generation in Dielectric Metasurfaces