Ultra-Thin Metasurface Absorbers for Spectro-Polarimetric Radiation Detectors: In-Depth Electromagnetic Analysis and Practical Design for Subterahertz Band

被引：0
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作者：
Kuznetsov, S. A. [1 ,2 ]
Arzhannikov, A. V. [1 ,3 ]
Fedorinin, V. N. [2 ]
机构：
[1] Novosibirsk State Univ, Dept Phys, Pirogova Str 2, Novosibirsk 630090, Russia
[2] RAS, SB, Rzhanov Inst Semicond Phys, Novosibirsk Branch TDIAM, Lavrentiev Ave 2-1, Novosibirsk 630090, Russia
[3] RAS, SB, Budker Inst Nucl Phys, Lavrentiev Ave 11, Novosibirsk 630090, Russia
来源：
2017 11TH INTERNATIONAL CONGRESS ON ENGINEERED MATERIALS PLATFORMS FOR NOVEL WAVE PHENOMENA (METAMATERIALS) | 2017年
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present the results of extensive theoretical and experimental investigations of high-performance ultra-thin metasurface-based radiation absorbers designed for narrow-band operation at subterahertz (subTHz) frequencies and intended for integration with spectropolarimetric sensors of a thermal type. Implemented in a three-layered configuration with a capacitive frequency selective surface (FSS) backed by a grounded dielectric slab, the absorbers are analyzed in terms of minimizing their thickness-to-wavelength (d/lambda) ratio and absorption bandwidth, while maximizing the FSS unit cells subwavelengthness and free dispersion range for absorption spectra. A choice of optimal material parameters and a role of near-field " FSS ground plane" coupling are discussed and an optimal FSS pattern for a " spectrometric" absorber is deduced. Supplemented with experimental measurements in the range of 0.1-1 THz demonstrating feasibility of attaining d/lambda similar to 1/200 at the bandwidth of several percent, original cost-effective metasurface-absorber-based schemes for uncooled thermal subTHz sensing with spectrometric, polarimetric, and imaging capabilities are also considered.
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页码：193 / 195
页数：3
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