Solar spectrum selective absorption metamaterial with metal nano-microsphere tangent structure and preparation method of solar spectrum selective absorption metamaterial

The invention belongs to the field of solar photo-thermal utilization, and particularly relates to a solar spectrum selective absorption metamaterial with a metal nano-microsphere tangent structure and a preparation method. The material structurally comprises three layers, the upper layer is a metal nano-microsphere layer with a tangent structure, the middle layer is a dielectric layer, and the bottom layer is a metal layer. The material is applied to a scene in which solar radiation electromagnetic waves are efficiently converted into heat energy, and the broadband absorption of a solar spectrum and the low-radiation characteristic of an infrared spectrum can be achieved; the material has the advantages of small thickness, high absorption, low cost, easiness in regulation and control, simple manufacturing process, high temperature resistance and the like, and is an efficient photo-thermal conversion material. 本发明属于太阳能光热利用领域，具体涉及一种金属纳米微球相切结构的太阳能光谱选择性吸收超材料及制备方法。所述材料结构包含三层，上层为具有相切结构的金属纳米微球层、中间层为介质层、底层为金属层该材料应用于