In this paper, a titanium cross-shaped based-metamaterial absorber in the visible and near-infrared regions is presented. The proposed solar thermal absorber consists of a cross-shaped titanium/SiO₂ spacer/TiN ground film structure enabling high broadband absorption and solar-thermal conversion efficiency. The broadband near-perfect absorption spectra with the proposed structure reach 97% for both TE and TM-polarization in the wavelength ranges of (from 386 to 1178 nm) and (from 300 to 1140 nm), respectively. Furthermore, the proposed structure exhibits a high solar thermal conversion efficiency of 96% under continuously variable of C from 1 to 1000, maintained over the wide operating temperature range 373–779 K. Remarkably, the performance of the structure has been promising for the enhancement of the solar thermal energy harvesting devices at middle to high temperatures.

在本文中，提出了一种在可见光和近红外区域的钛十字形基超材料吸收体。所提出的太阳能吸热器由十字形钛/SiO ₂间隔物/TiN 地膜结构组成，可实现高宽带吸收和太阳能热转换效率。对于 TE 和 TM 偏振，在（386 至 1178 nm）和（300 至 1140 nm）的波长范围内，具有所提出结构的宽带近完美吸收光谱分别达到 97%。此外，所提出的结构在C 的连续变量下表现出 96% 的高太阳能热转换效率 从 1 到 1000，保持在 373-779 K 的宽工作温度范围内。值得注意的是，该结构的性能对于增强中高温下的太阳能热能收集装置很有希望。