Ways to achieve highly efficient electromagnetic absorption over a broad bandwidth and broad angular spectrum have been discussed extensively in the past decades for various applications, such as low reflection devices and energy harvesting. To satisfy the efficiency requirements, metamaterial approaches have been explored in recent years. In this context, most studies have suggested the use of frequency selective surfaces or arrays of plasmonic resonators, which limit bandwidth and angular spectrum of performance. Here, we explore the application of refractory Brewster metasurfaces for photovoltaic applications. By matching the surface impedance of metasurfaces and free space at the Brewster angle, we show that metasurfaces can lead to efficient light absorption, and their response can be controlled accurately both in the angular and in the frequency spectrum to match the requirements of energy harvesting systems and facilitate large efficiency, high-temperature energy harvesting.

中文翻译：

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耐火布鲁斯特超表面控制光吸收的频率和角光谱

在过去的几十年中，人们广泛讨论了在宽带宽和宽角频谱上实现高效电磁吸收的方法，用于各种应用，例如低反射设备和能量收集。为了满足效率要求，近年来已经探索了超材料方法。在这种情况下，大多数研究建议使用频率选择表面或等离子体谐振器阵列，这限制了性能的带宽和角谱。在这里，我们探索了耐火 Brewster 超表面在光伏应用中的应用。通过在布鲁斯特角匹配超表面和自由空间的表面阻抗，我们表明超表面可以导致有效的光吸收，