Abstract

In this work, we propose and numerically investigate broadband antireflective random metasurfaces. We demonstrate that a random monolayer of identical metallic subwavelength spherical particles, deposited on a substrate, is able to suppress the reflection in a broadband spectral region over a wide range of incident angles and that it is insensitive to the polarization. From the optical properties of a single spherical particle, we show that the annihilation of the reflectivity is due to the constructive interference between the radiated electromagnetic waves from the electric dipole and the electric quadrupole induced within the particles. The metasurfaces we propose in this work have significant opportunities in many technological areas, including display technologies, glass windows, automobile industries, solar harvesting, and detectors. Furthermore, they are suitable for fabrication; hence, experimental validation of our theoretical predictions is feasible.

© 2021 Optical Society of America

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