A wideband metamaterial (MTM) absorber based on a concentric ring resonator is discussed at visible frequencies. The proposed structure offers a wideband absorption response, where absorption of <70% is gained for the frequency ranging from 537.91 to 635.73 THz. The analysis is conducted on the components of the proposed structure to understand the origin of wideband absorption. Furthermore, a graphene monolayer sheet is integrated to the proposed MTM absorber to optimize its absorptivity, where the studies show enhancement of the absorptivity of the proposed structure up to 26% from its initial absorptivity. MTM absorbers of this kind have potential applications in solar cells.
"Graphene-based wideband metamaterial absorber for solar cells application," Journal of Nanophotonics 11(3), 036008 (1 August 2017). https://doi.org/10.1117/1.JNP.11.036008
. Submission: Received: 25 May 2017; Accepted: 10 July 2017
Received: 25 May 2017; Accepted: 10 July 2017; Published: 1 August 2017