Open AccessUltrabroadband metamaterial absorbers from ultraviolet to near-infrared based on multiple resonances for harvesting solar energy
Author(s) -
He Feng,
Xiaoman Li,
Mei Wang,
Feng Xia,
Kun Zhang,
Weijin Kong,
Lifeng Dong,
Maojin Yun
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.419269
Subject(s) - metamaterial absorber , materials science , metamaterial , optics , polarization (electrochemistry) , optoelectronics , absorption (acoustics) , narrowband , dielectric , ultraviolet , infrared , ray , broadband , physics , tunable metamaterials , chemistry
In this paper, a metal-dielectric metamaterial absorber is proposed to achieve ultrabroadband absorption at frequencies from ultraviolet to near-infrared. Based on finite element method solutions, the average absorption of the absorber is 97.75% from 382 nm to 1100 nm, with a maximum of 99.92%, resulting from multiple resonance coupling. The influences of geometric parameters and incident conditions on absorption are investigated. Broadband and narrowband absorption changes are realized by changing incident light polarization. Polarization-independent properties can be realized by changing the dielectric structure to centrosymmetric. The average absorption of the polarization-independent structure is 97.11% from 250 nm to 1115 nm, with a maximum of 99.98%. The proposed absorber structure has wide optical applications including solar energy harvesting and light-emitting devices.