Brewster angle for anisotropic materials from the extinction theorem
Brewster angle for anisotropic materials from the extinction theorem
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DOI：
10.1007/s00339-006-3832-5
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发表时间：
2006-06
期刊：
影响因子：
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通讯作者：
W. Shu;Z. Ren;Hailu Luo;Fei Li
中科院分区：
文献类型：
--
作者：
W. Shu;Z. Ren;Hailu Luo;Fei Li
我们探讨的物理起源的布鲁斯特角在外部和内部的反射与各向异性材料。利用消光定理得到了反射场的表达式和布鲁斯特角的存在条件。当材料的电偶极子和磁偶极子对反射场的贡献之和为零时，就会出现布鲁斯特角。内反射时，对材料参数ε和μ对布鲁斯特角的要求与外反射时相同，布鲁斯特角就是外反射时外布鲁斯特角入射时的折射角。本文的结果适用于电介质和磁性材料，包括超材料。
We explore the physical origin of the Brewster angle in the external and internal reflections associated with an anisotropic material. We obtain the expressions of the reflected fields and the existence condition of the Brewster angle by using the extinction theorem. It is found that the Brewster angle will occur if the total contribution of the material’s electric and magnetic dipoles to the reflected field becomes zero. In internal reflection, the requirements on the material parametersεandμfor the Brewster angle are the same as those in external reflection, and the Brewster angle is just the refraction angle in external reflection at the incidence of the external Brewster angle. The results of the present paper are applicable to dielectric and magnetic materials, including metamaterials.