Design and verification of an all-dielectric metamaterial and its application in wide-spectrum measurement of clothing fabrics


 The application of metamaterial sensors in the field of measurement is one of the hotspots in the current material field. However, since most metamaterial sensors contain metal arrays. Therefore, the resonant absorption modes based on metal arrays are difficult to cancel. The measurement principle of the absorption rate of clothing fabrics requires that there is no obvious resonance absorption in a wide range of frequency spectrum. Therefore, in this paper, an all-dielectric metamaterial is proposed and measured. The metamaterial cannot excite obvious resonant absorption modes (average absorptivity of 25.2%) in the range of 22-56 THz. When the metamaterial is covered by the fabric sample Polyester, the measured average absorptivity of the Polyester is 41.5%. When the thickness of the fabric sample Polyester is set to 0.2mm, 0.3mm, 0.4mm, 0.5mm, the measured average absorptivity of the Polyester is are 41.5%, 48.3, 57.6, 62.1, respectively. The average absorbency of the four fabric samples was measured: 41.5%, 25.1%, 34.3%, and 56.6%, respectively. The theoretical calculation results are close to the measurement results, and these results verify the feasibility of the all-dielectric metamaterial in the field of fabric measurement.