All-optical polarization encoding and modulation by nonlinear interferometry at the nanoscale.

ABSTRACT: Optical metasurfaces allow complex light manipulation within subwavelength thicknesses and are thus rapidly emerging as a key enabling technology for nanophotonics applications. The control over light polarization already provided a route towards ultracompact metasurface-based polarimetry devices. If translated to the nonlinear optical regime it may become a transformative tool for nonlinear imaging, optical holography, and sensing. Here, we report ultrafast all-optical polarization modulation of upconverted light by all-dielectric metasurfaces via nonlinear interferometry. By controlling the relative phase between a pump beam at ω and its frequency-doubled replica at 2ω, we can set the phase relation between two frequency-degenerate upconversion processes at 3ω - sum-frequency generation

SUBMITTER: Luan Y 

PROVIDER: S-EPMC12434142 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature