Mesh-based metasurfaces with high optical transparency
Year: 2025
Type: article
Abstract: A metasurface technology is proposed, which uses a fine-line-based mesh to form a resonant structure instead of the traditional resonant pattern. Because the filling factor of the fine lines is low, the metasurface has high optical transmittance. Meanwhile, a highly efficient electromagnetic absorption can be achieved through the stacking of the metasurfaces. To demonstrate the effectiveness, we designed an optically transparent microwave absorber with polarization insensitivity and wide-angle incidence characteristics. The absorber is composed of a top mesh metasurface film, a transparent layer, and a bottom mesh film. Next, the sample with an area of 150 × 150 mm 2 was fabricated using nano-imprinting technology. Through testing, the top metasurface and the bottom film achieved an average optical transmittance of 91.53% and 92.67%, respectively. Furthermore, by adjusting the stacking gap (transparent layer thickness), the absorption rate could be adjusted from 94.15% to 18.4%. Embedding the metasurface films into transparent windows or materials can achieve both efficient electromagnetic absorption and optical transparency.
Source: Optics Express
DOI: 10.1364/oe.580488
Authors: Minghui Deng, Tiansheng Cui, Bozhen Hou, Yayuan Zhang, Huizhang Zhao, Huiqi Jiang, Lesiqi Yin, Cheng Gong, Fei Fan, Shengjiang Chang
Institution: Nankai University
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
OpenAlex ID: W4415909969