Optical Metasurfaces – planarized patterned devices with thickness smaller than or comparable to the operational wavelength – can engineer the light wavefront beyond the limitations of natural materials, and they offer novel opportunities for optical technologies. I will discuss our recent efforts in the design, optimization, fabrication and characterization of all-dielectric high-index-contrast metasurfaces enabling different linear and nonlinear functionalities, such as analog image processing, efficient displays for augmented reality and nonreciprocal wave propagation. I will discuss the main potentials and challenges of current approaches and provide an outlook on possible future directions.
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