A metamaterial absorber for the terahertz regime: design, fabrication and characterization.

By H. Tao, N. Landy, C. Bingham, Xin Zhang, R. Averitt, Willie J Padilla. Optics Express, 2008

1,321 citations recorded by the source corpus.

We present a metamaterial that acts as a strongly resonant absorber at terahertz frequencies. Our design consists of a bilayer unit cell which allows for maximization of the absorption through independent tuning of the electrical permittivity and magnetic permeability. An experimental absorptivity of 70% at 1.3 terahertz is demonstrated. We utilize only a single unit cell in the propagation direction, thus achieving an absorption coefficient alpha = 2000 cm(-1). These metamaterials are promising candidates as absorbing elements for thermally based THz imaging, due to their relatively low volume, low density, and narrow band response.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/517505161aea1238c995f9d94bf8f85bebe1d78e

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In Electrical and Electronic Engineering

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Widely Tunable Terahertz Phase Modulation with Gate-Controlled Graphene Metasurfaces (2015, background): “At the critical point, Γr 1⁄4 Γi implies that the system acts as a perfect absorber [47,48].”
Design of multi-band metamaterial perfect absorbers with stacked metal–dielectric disks (2013, background): “Since then many metamaterials have been made with near unity absorption at smaller wavelengths, from infrared to optical frequencies [10, 11].”