Near-infrared polarimetric imaging with nonlinear flat-optics

Evgenii Menshikov; Marco A. López Sánchez; Paolo Franceschini; Andrea Tognazzi; Domenico de Ceglia; Kristina Frizyuk; Costantino De Angelis

arXiv · 2512.01525

Near-infrared polarimetric imaging with nonlinear flat-optics

Evgenii Menshikov·Marco A. López Sánchez·Paolo Franceschini·Andrea Tognazzi·Domenico de Ceglia·Kristina Frizyuk·Costantino De Angelis

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Abstract

A compact and broadband polarimetric imaging platform is presented, based on second-harmonic generation (SHG) in nonlinear flat-optics. The system employs periodic all-dielectric AlGaAs gratings to induce polarization-dependent SH emission, enabling pixel by pixel direct retrieval of the full Stokes vector from an input intensity distribution in the near-infrared range. By engineering the geometry and orientation of the polarimetric units, sensitivity to linear and circular polarization components is achieved. A superpixel design comprising four polarimetric structures allows accurate reconstruction of the polarization state without moving parts or sequential measurements. This approach offers a scalable, passive, and cost-effective solution for polarimetric imaging, particularly suited for near-infrared applications.

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Evgenii Menshikov, Marco A. López Sánchez, Paolo Franceschini, Andrea Tognazzi, Domenico de Ceglia, Kristina Frizyuk, Costantino De Angelis. 2025-12-01. Near-infrared polarimetric imaging with nonlinear flat-optics. https://arxiv.org/abs/2512.01525

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