6533b830fe1ef96bd12966a2

RESEARCH PRODUCT

Finite-Size and Illumination Conditions Effects in All-Dielectric Metasurfaces

Fabrizio FrezzaLorenzo PattelliLuca CiarellaAndrea TognazziCostantino De AngelisFabio Mangini

subject

All-dielectric metasurfaces BIC Multipolar decomposition T-matrixComputer Networks and CommunicationsHardware and ArchitectureControl and Systems Engineeringall-dielectric metasurfaces; multipolar decomposition; T-matrix; BICSignal ProcessingPhysics::OpticsSettore ING-INF/02 - Campi ElettromagneticiElectrical and Electronic Engineering

description

Dielectric metasurfaces have emerged as a promising alternative to their plasmonic counterparts due to lower ohmic losses, which hinder sensing applications and nonlinear frequency conversion, and their larger flexibility to shape the emission pattern in the visible regime. To date, the computational cost of full-wave numerical simulations has forced the exploitation of the Floquet theorem, which implies infinitely periodic structures, in designing such devices. In this work, we show the potential pitfalls of this approach when considering finite-size metasurfaces and beam-like illumination conditions, in contrast to the typical infinite plane-wave illumination compatible with the Floquet theorem.

yearjournalcountryeditionlanguage
2022-03-24Electronics
https://doi.org/10.3390/electronics11071017