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Suboptimal Coding Metasurfaces for Terahertz Diffuse Scattering

by Wu, Rui Yuan , Galdi, Vincenzo , Andreone, Antonello , Castaldi, Giuseppe , Koral, Can , Papari, Gian Paolo , Moccia, Massimo , Cui, Tie Jun , Zhang, Lei , Liu, Shuo

in 639/166/987 / 639/301/1019/1015 / Algorithms / Computer applications / Humanities and Social Sciences / multidisciplinary / Photovoltaics / Radar / Science / Science (multidisciplinary) / Wavelengths

2018

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Suboptimal Coding Metasurfaces for Terahertz Diffuse Scattering

by Wu, Rui Yuan , Galdi, Vincenzo , Andreone, Antonello , Castaldi, Giuseppe , Koral, Can , Papari, Gian Paolo , Moccia, Massimo , Cui, Tie Jun , Zhang, Lei , Liu, Shuo

2018

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Suboptimal Coding Metasurfaces for Terahertz Diffuse Scattering

by Wu, Rui Yuan , Galdi, Vincenzo , Andreone, Antonello , Castaldi, Giuseppe , Koral, Can , Papari, Gian Paolo , Moccia, Massimo , Cui, Tie Jun , Zhang, Lei , Liu, Shuo

2018

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Journal Article

Suboptimal Coding Metasurfaces for Terahertz Diffuse Scattering

Wu, Rui Yuan,

Galdi, Vincenzo,

Andreone, Antonello,

Castaldi, Giuseppe,

Koral, Can,

Papari, Gian Paolo,

Moccia, Massimo,

Cui, Tie Jun,

Zhang, Lei,

Liu, Shuo

2018

Overview

Coding metasurfaces, composed of only two types of elements arranged according to a binary code, are attracting a steadily increasing interest in many application scenarios. In this study, we apply this concept to attain diffuse scattering at THz frequencies. Building up on previously derived theoretical results, we carry out a suboptimal metasurface design based on a simple, deterministic and computationally inexpensive algorithm that can be applied to arbitrarily large structures. For experimental validation, we fabricate and characterize three prototypes working at 1 THz, which, in accordance with numerical predictions, exhibit significant reductions of the radar cross-section, with reasonably good frequency and angular stability. Besides the radar-signature control, our results may also find potentially interesting applications to diffusive imaging, computational imaging, and (scaled to optical wavelengths) photovoltaics.

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Publisher

Nature Publishing Group UK,Nature Publishing Group

Subject

639/166/987

/ 639/301/1019/1015

/ Algorithms

/ Computer applications

/ Humanities and Social Sciences

/ multidisciplinary

/ Photovoltaics