Compact polarization multiplexing integrated with double-phase metasurface encoding operators for all-nanophotonic image processing

https://www.eurekalert.org/news-releases/1128776

"full complex-field modulation at visible wavelengths processes light directly to execute, without requiring digital post-processing, real-time computational tasks: edge detection, object recognition, 1st/ 2nd-order differentiation... also, titanium dioxide nanopillar arrays extended handling high-resolution volumetric holography for precise 3D wavefront reconstruction... robust, energy-efficient under multi-wavelength illumination/ alignment variations... no bulky conventional optical components"