期刊
LIGHT-SCIENCE & APPLICATIONS
卷 10, 期 1, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41377-021-00529-2
关键词
-
类别
资金
- National Key R&D Program of China [2020YFA0211300, 2017YFA0303702]
- National Natural Science Foundation of China [11974176, 11634005, 11974177, 61975078, 11704271]
- Natural Science Foundation of Jiangsu Province [BK20170326]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Research Grants Council of Hong Kong [R6015-18]
This study identified an exception to the Brewster effect by creating nonmagnetic anisotropic metamaterials to achieve anomalous Brewster effects with independently tunable absorption and refraction, offering the potential for unprecedented wide bandwidth for reflectionless absorption with high efficiency.
The Brewster's law predicts zero reflection of p-polarization on a dielectric surface at a particular angle. However, when loss is introduced into the permittivity of the dielectric, the Brewster condition breaks down and reflection unavoidably appears. In this work, we found an exception to this long-standing dilemma by creating a class of nonmagnetic anisotropic metamaterials, where anomalous Brewster effects with independently tunable absorption and refraction emerge. This loss-independent Brewster effect is bestowed by the extra degrees of freedoms introduced by anisotropy and strictly protected by the reciprocity principle. The bandwidth can cover an extremely wide spectrum from dc to optical frequencies. Two examples of reflectionless Brewster absorbers with different Brewster angles are both demonstrated to achieve large absorbance in a wide spectrum via microwave experiments. Our work extends the scope of Brewster effect to the horizon of nonmagnetic absorptive materials, which promises an unprecedented wide bandwidth for reflectionless absorption with high efficiency.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据