電磁波在磁性分層薄膜中的傳播非互易反射
ELECTROMAGNETIC WAVE PROPAGATION IN MAGNETIC MULTILAYERS-NON-RECIPROCAL REFLECTIONS
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摘要: 本文采用傳輸矩陣研究了電磁波在磁性多層膜和超晶格中的透射和反射,獲得了層狀磁性介質的透射和反射系數(shù),包括:(1)半無限磁性表面,(2)磁性多層膜,(3)半無限磁性超晶格。數(shù)值計算結果表明,磁性分層系統(tǒng)中電磁表面模可以通過電磁波斜入射在膜面上而激發(fā)出來,表現(xiàn)為S-極化反射曲線的尖谷,因此,本文指出電磁波傳播的色散曲線可以用一種類似衰減全反射(ATR)的技術來測量。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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