Tunable reflectionless absorption of electromagnetic waves in a plasma-metamaterial composite structure

TitleTunable reflectionless absorption of electromagnetic waves in a plasma-metamaterial composite structure
Publication TypeJournal Article
Year of Publication2020
AuthorsUchizono, Nolan M., Stephen A. Samples, and Richard E. Wirz
JournalPlasma Sources Science and Technology
Date Published07/2020
Keywordsplasma-metamaterial composites, reflectionless absorption, surface plasmon polariton
AbstractWe present the first experimental demonstration of a tunable reflectionless absorption resonance in a metamaterial integrated with a plasma discharge. A one-dimensional metamaterial structure excites transverse magnetic slow-wave modes known as “spoof” surface plasmon polaritons. When interfaced with an argon plasma discharge, the metamaterial-induced “spoof” plasmon mode is converted to a plasmon polariton mode confined to the plasma/dielectric interface. The reflectionless absorption band that manifests in the metamaterial's spectral response exhibits a dependency on the plasma's electron density that agrees well with theory.
URLhttps://iopscience.iop.org/article/10.1088/1361-6595/aba489
DOI10.1088/1361-6595/aba489

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