We report the design, characterization, and experimental demonstration of a broadband near-perfect absorber in the visible regime based on strong interference in ultrathin molybdenum disulfide films obtained by the spin-coating method. The absorber is polarization-insensitive, and the absorption peak maintains a high value for large angles of incidence, which provides more efficient absorption for nonpolarized or oblique incident beams. The experimental results show that the absorption can reach more than 87% between 400 nm and 640 nm, which is in reasonable agreement with the simulated results. This work may offer a further step in the development of solar absorption-based nano-optoelectronic devices.

中文翻译：

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基于少层二硫化钼薄膜的可见光区超薄偏振不敏感广角宽带近乎完美吸收器

我们报告了基于旋涂法获得的超薄二硫化钼薄膜的强干扰在可见光区域中宽带近乎完美吸收体的设计、表征和实验演示。吸收体对偏振不敏感，吸收峰在大入射角时保持高值，这为非偏振或斜入射光束提供更有效的吸收。实验结果表明，在400~640 nm之间吸收率可达87%以上，与模拟结果基本吻合。这项工作可能为开发基于太阳能吸收的纳米光电器件提供了进一步的帮助。