Extending the absorption band from infrared to ultraviolet using the ITO transition from reflection to transparence

A numerical simulation based on the finite-element method shows that a metamaterial absorber using Tungsten (W) and Indium tin oxide (ITO) plasmonic metals can be ultra-broadband and show high-performance. Conventional broadband absorbers usually consist of multiple metal-dielectric layers or multi-...

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Bibliographic Details
Published inEuropean physical journal. Applied physics Vol. 96; no. 1; p. 10501
Main Authors Bendelala, Fathi, Cheknane, Ali, Benatallah, Mohammed, Nunzi, Jean-Michel
Format Journal Article
LanguageEnglish
Published 01.10.2021
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Summary:A numerical simulation based on the finite-element method shows that a metamaterial absorber using Tungsten (W) and Indium tin oxide (ITO) plasmonic metals can be ultra-broadband and show high-performance. Conventional broadband absorbers usually consist of multiple metal-dielectric layers or multi-resonators and have a bulky shape. The present work investigates the possibility to reach optimal characteristics with a simple design by combining two plasmonic materials (W/ITO) within a single resonator. Involving the ITO transition from reflection to transparence dramatically increases the absorption bandwidth, which is extended from infrared to ultraviolet, with up to 99.92% absorption. The design is polarization-insensitive under oblique incidence, up to 75° and 80°, for TE and TM polarization waves, respectively.
ISSN:1286-0042
1286-0050
DOI:10.1051/epjap/2021210133