Absorption properties of hyperuniform and Poisson Point Process distributed metasurfaces at infrared wavelengths

Abstract

In this article, we analyze the extinction and absorption properties of randomly distributed Metal–Insulator–Metal (MIM) metasurfaces operating at an infrared wavelength. Our attention has been focused on the comparison between correlated disordered, namely, hyperuniform, and Poisson Point Process distributed structures. To this aim, we define absorption and extinction terms by considering Floquet modes within a super-cell simulated by a finite element approach. Then, the role of particle intercoupling in high-density random metasurfaces has been pointed out and analyzed as a function of linear polarization of the impinging wave. Finally, hyperuniform and Poisson Point Process distribution have been compared for metasurface filling fraction ranging between 5% and 50% and relative standard deviations up to 1:0, taking the square periodic array as a reference.