2020/07/21 by Marino Coppolaro, Giuseppe Castaldi, Vincenzo Galdi · 15 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Dielectric #Fibonacci number #Lasing threshold #Metamaterial #Metamaterials and Metasurfaces Applications #Optics #Optoelectronics #Parametric statistics #Photonic Crystals and Applications #Physics #Quasicrystal Structures and Properties #Quasiperiodic function #Quasiperiodicity #Wavelength #cond-mat.mtrl-sci #physics.app-ph #physics.optics
paper · pdf · doi:10.1103/physrevb.102.075107
published in Physical review. B./Physical review. B 102(7) (American Physical Society) · 33 pages; 16 figures
arxiv created 2020/07/21 · openalex publication_date 2020/08/05 · arxiv updated 2020/08/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
For dielectric multilayered metamaterials, the effective-parameter representation is known to be insensitive to geometrical features occurring at deeply subwavelength scales. However, recent studies on periodic and aperiodically ordered geometries have shown the existence of certain critical parameter regimes where this conventional wisdom is upended, as the optical response of finite-size samples may depart considerably from the predictions of standard effective-medium theory. In these regimes, characterized by a mixed evanescent/propagating light transport, different classes of spatial (dis)order have been shown to induce distinctive effects in the optical response, in terms of anomalous transmission, localization, enhancement, absorption, and lasing. Here we further expand these examples by considering a quasiperiodic scenario based on a modified-Fibonacci geometry. Among the intriguing features of this model there is the presence of a scale parameter that controls the transition from perfectly periodic to quasiperiodic scenarios of different shades. Via an extensive parametric study, this allows us to identify the quasiperiodicity-induced anomalous effects, and to elucidate certain distinctive mechanisms and footprints. Our results hold potentially interesting implications for the optical probing of structural features at a resolution much smaller than the wavelength, and could also be leveraged to design novel types of absorbers and low-threshold lasers.