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In this work, we study optical properties of all-dielectric metasurfaces on the top of high-index substrate. We perform numerical simulations of spherical nanoparticle arrays for different permittivities of the substrate, and propose a simple model with separate contributions from nanoparticle arrays and bare substrate into the total reflection, which fully agrees with numerical results. For the single...
We report on our experimental and numerical studies of optically-induced magnetic and electric dipole resonances of spherical silicon nanoparticles. We combine polarization-resolved dark-field spectroscopy and near-field scanning optical microscopy and demonstrate experimentally that electromagnetic fields scattered by nanoparticles exhibit strong sensitivity to the probing beam polarization both...
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