A Transparent broadband all-dielectric water-based metamaterial absorber based on laser cutting
Lintao Li, Jingda Wen, Yichen Wang, Yue Jin, Yongzheng Wen, Jingbo Sun, Qian Zhao, Bo Li, Ji Zhou
Abstract
Abstract Gradually attracting attention on the all-dielectric broadband metamaterial absorber is developing in the application of multi-functionalization, such as the optical transparent transmission function of the microwave absorber. In this paper, we designed an all-dielectric transparent broadband metamaterial absorber utilizing the composited structure of the layered and cylindrical water with the shell of cross-shaped PMMA. Then, the series of the patterned shell are fabricated by the two-dimensional laser cutting technology with ultra-fast, accurate, and simplified process. Both the simulated and experimental performance show high absorption over 90% at 13.3–40 GHz and optical transmittance of 73% with polarization insensitivity and wide-angle incident tolerance. Furthermore, the transparent absorber can modulate the low-frequency absorptivity by adjusting the temperature and ion concentration. Our all-dielectric transparent broadband metamaterial absorber based on laser cutting technology has promising potential in a wider range of both civil and military applications.