Comment on “An ultrathin and broadband metamaterial absorber using multi-layer structures” [J. Appl. Phys. 114, 064109 (2013)]

In a recent publication by Xiong et al. [J. Appl. Phys. 114, 064109 (2013)], a linear cross-polarizer is erroneously interpreted as a broadband absorber with a claimed absorptivity above 90% over a frequency range of 8.3721 GHz. In this article, the authors have presented an investigative study demo...

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Bibliographic Details
Published inJournal of applied physics Vol. 125; no. 16
Main Authors Wahidi, M. S., Mustafa, Meraj-E-, Tahir, Farooq A.
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 28.04.2019
Subjects
Absorbers
Absorbers (materials)
Absorptivity
Applied physics
Broadband
Conversion ratio
Electromagnetic radiation
Frequency ranges
Metamaterials
Multilayers
Polarization
Polarizers
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Summary:In a recent publication by Xiong et al. [J. Appl. Phys. 114, 064109 (2013)], a linear cross-polarizer is erroneously interpreted as a broadband absorber with a claimed absorptivity above 90% over a frequency range of 8.3721 GHz. In this article, the authors have presented an investigative study demonstrating that the structure proposed by Xiong et al. is actually an efficient cross-polarizer rather than a perfect absorber. If we consider both co- and cross-polarized components of the reflected electromagnetic wave, the subject absorber provides less than 20% absorption in the claimed band. In addition, the polarization conversion ratio of the structure is above 85% within the operating band, this makes the subject metasurface a potential candidate for applications where high-efficiency cross-polarization is desired.
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ISSN:0021-8979
1089-7550
DOI:10.1063/1.5067355