Jiang Xiaoyun, Wang Tao, Zhong Qingfang, Yan Ruoqin, Huang Xing
Opt Express. 2020 Jan 6;28(1):705-714. doi: 10.1364/OE.382139.
Photonic topological transitions (PTTs) in metamaterials open up a novel approach to design a variety of high-performance optical devices and provide a flexible platform for manipulating light-matter interactions at nanoscale. Here, we present a wideband spectral-selective solar absorber based on multilayered hyperbolic metamaterial (HMM). Absorptivity of higher than 90% at normal incidence is supported over a wide wavelength range from 300 to 2215 nm, due to the topological change in the isofrequency surface (IFS). The operating bandwidth can be flexibly tailored by adjusting the thicknesses of the metal and dielectric layers. Moreover, the near-ideal absorption performance can be retained well at a wide angular range regardless of the incident light polarization. These features make the proposed design hold great promise for practical applications in energy harvesting.
超材料中的光子拓扑转变（PTTs）为设计各种高性能光学器件开辟了一种新方法，并为在纳米尺度上操纵光与物质的相互作用提供了一个灵活的平台。在此，我们展示了一种基于多层双曲线超材料（HMM）的宽带光谱选择性太阳能吸收器。由于等频面（IFS）的拓扑变化，在300至2215nm的宽波长范围内，垂直入射时吸收率高于90%。通过调整金属和介电层的厚度，可以灵活地调整工作带宽。此外，无论入射光的偏振如何，在宽角度范围内都能很好地保持接近理想的吸收性能。这些特性使得所提出的设计在能量收集的实际应用中具有很大的前景。
