Flexible Quasi-Three-Dimensional Terahertz Metamaterials
Abul K. Azad, Hou-Tong Chen, Antoinette J. Taylor, Elshan Akhadov,, Nina R. Weisse-Bernstein, and John F. O'Hara (Los Alamos National Laboratory)
TL;DR
This paper investigates flexible, layered terahertz metamaterials, demonstrating their resonant properties and validating the effective medium approximation through experimental measurements and analysis.
Contribution
It introduces a method to characterize quasi-three-dimensional flexible terahertz metamaterials and validates the effective medium approximation for layered structures.
Findings
Resonant band-stop behavior intensifies with more layers
Dielectric functions are independent of layer count
Effective medium approximation is valid within certain limits
Abstract
We characterize planar electric terahertz metamaterials fabricated on thin, flexible substrates using terahertz time-domain spectroscopy. Quasi-three-dimensional metamaterials are formed by stacking multiple metamaterial layers. Transmission measurements reveal resonant band-stop behavior that becomes stronger with an increasing number of layers. Extracted metamaterial dielectric functions are shown to be independent of the number of layers, validating the effective medium approximation. Limitations of this approximation are discussed.
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Taxonomy
TopicsMetamaterials and Metasurfaces Applications · Terahertz technology and applications · Plasmonic and Surface Plasmon Research