Metal metasurface filter for thermophotovoltaic

The invention relates to a metal metasurface filter, in particular to a metal metasurface filter for thermophotovoltaic. The invention aims to solve the problems that an existing photonic crystal filter is narrow in high reflection wave band and large in energy loss, the metal metasurface filter is small in feature size and a preparation method is high in cost. The metal metasurface filter used for thermophotovoltaic is composed of a transparent substrate layer and sub-wavelength hole structure precious metal film layers. The sub-wavelength hole structure precious metal film layers are arranged on the transparent substrate layer, and a filling layer is arranged between every two adjacent sub-wavelength hole structure precious metal film layers. 一种用于热光伏的金属超表面滤波器，它涉及一种金属超表面滤波器。本发明要解决现有光子晶体滤波器的高反射波段较窄，能量损耗较大；金属超表面滤波器特征尺寸小，制备方法成本过高的问题。一种用于热光伏的金属超表面滤波器由透明基底层和亚波长孔结构的贵金属膜层组成；所述的透明基底层上设置亚波长孔结构的贵金属膜层，相邻亚波长孔结构的贵金属膜层之间设置填充层。