ИСТИНА

Under certain conditions, point-like particles with induced electric and magnetic dipolar components may exhibit a coherent magnetodielectric response giving rise to interesting light scattering effects, such as the total suppression of backscattered radiation (zero-backward scattering) or a minimum in the scattered intensity in the forward direction (not exactly zero due to the radiative correction). Recent research on light scattering by particles smaller than the incident wavelength, made of high refractive index materials with low absorption, like Silicon in the near-infrared, has shown to have a real magnetodielectric response due to coherence interference between induced electric and magnetic resonant modes. In general, the spectrum of the scattered light by this kind of particles for sizes in the range of hundreds of nm, is very rich in a wide spectral range comprising visible and near- infrared frequencies. It does not only shows multiple resonances corresponding to different multipolar orders, either electric or magnetic (dipolar and quadrupolar) but also, due to the finite width of these resonances and their overlapping, an enormous variety of interesting coherent phenomena can be found, such as directional radiation scattering effects and Fano-like resonances of different nature. The purpose of this talk is to present a survey of these coherent effects and their possible influence in applications where the advantage of the dielectric nature of materials and low losses is relevant (optimization of harvesting of natural radiation for power generation, supersensitive nanoantennas, surface enhanced applications for matter analysis, building blocks (meta-atoms) for new metamaterials design, etc).