The research about all-dielectric metasurfaces is particularly popular in the last years because they have proven to enable the same effects of metallic metasurfaces but with reduced electromagnetic losses [1] - [5]. The peculiar electromagnetic behavior of these structures, consisting of a 2D array of sub-wavelength particles made by a high-permittivity material, stems from the excitation of orthogonal electric and magnetic dipole moments within each individual particle. The collective behavior of these dipoles can be tailored by acting on the shape of the individual particle as well as on the separation distance between neighboring elements [4]. While the possibilities enabled by the tangential electric and magnetic dipoles have been widely investigated, the study of the spatial dispersion of all-dielectric metasurfaces is a relatively new topic, which may enable new and intriguing effects [3].
Monti, A., Alu, A., Toscano, A., Bilotti, F. (2021). Exploiting the spatial dispersion of all-dielectric metasurfaces for realizing ultra-thin angular filters and anti-reflection coatings at extreme angles. In 2021 International Conference on Electromagnetics in Advanced Applications, ICEAA 2021 (pp.025-025). Institute of Electrical and Electronics Engineers Inc. [10.1109/ICEAA52647.2021.9539679].
Exploiting the spatial dispersion of all-dielectric metasurfaces for realizing ultra-thin angular filters and anti-reflection coatings at extreme angles
Monti A.;Toscano A.;Bilotti F.
2021-01-01
Abstract
The research about all-dielectric metasurfaces is particularly popular in the last years because they have proven to enable the same effects of metallic metasurfaces but with reduced electromagnetic losses [1] - [5]. The peculiar electromagnetic behavior of these structures, consisting of a 2D array of sub-wavelength particles made by a high-permittivity material, stems from the excitation of orthogonal electric and magnetic dipole moments within each individual particle. The collective behavior of these dipoles can be tailored by acting on the shape of the individual particle as well as on the separation distance between neighboring elements [4]. While the possibilities enabled by the tangential electric and magnetic dipoles have been widely investigated, the study of the spatial dispersion of all-dielectric metasurfaces is a relatively new topic, which may enable new and intriguing effects [3].I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
