Efficient absorption of solar spectral radiation is a key requirement in solar heat utilization. In an effort to achieve this goal, this study investigated slow light effect and magnetic polaritons, and analyzed other physical model coupling mechanisms in photonic crystals. To construct a class of two-dimensional layers of Ni-Al₂O₃ as a pyramid array solar energy absorber, the high melting points of Ni and Al₂O₃ were utilized to create an arrangement of absorbers with good thermal stability, low sensitivity to angle of incidence, and polarization independence. Based on AM1.5 solar spectral data, a simulation study of the photothermal absorption characteristics of this type of absorber in the 0.3–2.5 µm band was conducted. The results showed that the photothermal conversion efficiency is as high as 96.45%. Compared with the traditional single physical effect design, the conversion efficiency of this photonic crystal structure is increased by ~11%. Furthermore, increasing the concentration factor allows the absorber to maintain high efficiency even at high temperatures, which provides theoretical evidence for the efficient use of solar radiation. This work will be beneficial in several areas, including solar thermal utilization, thermal photovoltaics, absorber design, and radiator design in radiant refrigeration systems.

有效吸收太阳光谱辐射是太阳热利用的关键要求。为了实现这一目标，本研究调查了慢光效应和磁极化子，并分析了光子晶体中的其他物理模型耦合机制。为了构造一类二维的Ni-Al ₂ O _3层作为金字塔形太阳能吸收器，Ni和Al ₂ O _3的熔点高用它们来制造具有良好的热稳定性，对入射角的灵敏度低和偏振独立性的吸收体排列。根据AM1.5太阳光谱数据，对这种类型的吸收体在0.3-2.5 µm波段的光热吸收特性进行了模拟研究。结果表明，光热转化效率高达96.45％。与传统的单一物理效果设计相比，该光子晶体结构的转换效率提高了约11％。此外，增加集中系数可以使吸收器即使在高温下也能保持高效率，这为有效利用太阳辐射提供了理论依据。这项工作将在多个领域有所帮助，包括太阳能热利用，热光伏技术，