Abstract
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 spectro-polarimetric 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 / λ) 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 / λ∼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.
Original language | English |
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Title of host publication | 2017 11th International Congress on Engineered Material Platforms for Novel Wave Phenomena, Metamaterials 2017 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 193-195 |
Number of pages | 3 |
ISBN (Electronic) | 9781538637685 |
DOIs | |
Publication status | Published - 14 Nov 2017 |
Event | 11th International Congress on Engineered Material Platforms for Novel Wave Phenomena, Metamaterials 2017 - Marseille, France Duration: 28 Aug 2017 → 2 Sep 2017 |
Conference
Conference | 11th International Congress on Engineered Material Platforms for Novel Wave Phenomena, Metamaterials 2017 |
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Country/Territory | France |
City | Marseille |
Period | 28.08.2017 → 02.09.2017 |