Flexible metamaterial absorbers for stealth applications at terahertz frequencies | Zendy

Krzysztof Iwaszczuk | Zendy; Andrew C. Strikwerda | Zendy; Kebin Fan | Zendy; Xin Zhang | Zendy; Richard D. Averitt | Zendy; Peter Uhd Jepsen | Zendy

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Flexible metamaterial absorbers for stealth applications at terahertz frequencies

Author(s) -

Krzysztof Iwaszczuk,

Andrew C. Strikwerda,

Kebin Fan,

Xin Zhang,

Richard D. Averitt,

Peter Uhd Jepsen

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.20.000635

Subject(s) - metamaterial , optics , terahertz radiation , reflection coefficient , radar , radar cross section , reflection (computer programming) , cylinder , materials science , planar , near and far field , bistatic radar , beam (structure) , physics , cross section (physics) , radar imaging , scattering , geometry , computer science , telecommunications , mathematics , computer graphics (images) , quantum mechanics , programming language

We have wrapped metallic cylinders with strongly absorbing metamaterials. These resonant structures, which are patterned on flexible substrates, smoothly coat the cylinder and give it an electromagnetic response designed to minimize its radar cross section. We compare the normal-incidence, small-beam reflection coefficient with the measurement of the far-field bistatic radar cross section of the sample, using a quasi-planar THz wave with a beam diameter significantly larger than the sample dimensions. In this geometry we demonstrate a near-400-fold reduction of the radar cross section at the design frequency of 0.87 THz. In addition we discuss the effect of finite sample dimensions and the spatial dependence of the reflection spectrum of the metamaterial.

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