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Design of an ultra-thin, multiband, micro-slot based terahertz metamaterial absorber

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  • Sinan Aksimsek

Abstract

An ultra-thin, multiband, micro-slot based metamaterial absorber is presented in this paper. The proposed unit cell is compact which is in the form of single-layer gold patch-gallium arsenide-ground package, involving four identical micro-slots. Using the micro-slots, the fundamental circular patch gains a multiband resonation skill, and the absorber operates at 1.16, 2.73, and 4.57 THz bands with near-perfect absorptivity. The absorption mechanism is discussed based on the electric and surface current distributions, and all outcomes are also validated by the effective medium approach. The proposed absorber is ultra-thin with a thickness of 2.6 µm, corresponding to ∼λ/100 at its lowest operation frequency. The unit cell indicates polarization-independent, and wide incident angle absorption spectra up to 40°, hence, the proposed absorber is a promising candidate as an absorbing platform for THz band imaging and sensing applications.

Suggested Citation

  • Sinan Aksimsek, 2020. "Design of an ultra-thin, multiband, micro-slot based terahertz metamaterial absorber," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 34(16), pages 2181-2193, November.
    • Handle: RePEc:taf:tewaxx:v:34:y:2020:i:16:p:2181-2193
    DOI: 10.1080/09205071.2020.1809532
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