电磁波在磁性分层薄膜中的传播非互易反射
ELECTROMAGNETIC WAVE PROPAGATION IN MAGNETIC MULTILAYERS-NON-RECIPROCAL REFLECTIONS
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摘要: 本文采用传输矩阵研究了电磁波在磁性多层膜和超晶格中的透射和反射,获得了层状磁性介质的透射和反射系数,包括:(1)半无限磁性表面,(2)磁性多层膜,(3)半无限磁性超晶格。数值计算结果表明,磁性分层系统中电磁表面模可以通过电磁波斜入射在膜面上而激发出来,表现为S-极化反射曲线的尖谷,因此,本文指出电磁波传播的色散曲线可以用一种类似衰减全反射(ATR)的技术来测量。Abstract: A theory of EM wave propagation through magnetic multilayers and superlattices is presented based on the propagation matrix of a magnetic film. By using the P matrix, the transmission and reflection coeffcients of layered magnetic media, including: (1) semi-infinite magnetic surfaces, (2) magnetic multilayers, (3) semi-infinite magnetic superlattices, are obtained. The numerical results show that the EM modes of a magnetic layer system are excited and manifested as the sharp dips in the S-polarized reflection, and the dispersion curves of magnetic polaritons can be measured by a method similar to attenuated total reflection (ATR) technique.
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