A theoretical analysis of magneto-optical Faraday effect of YIG films with random multilayer structures

被引:168
作者
Inoue, M
Fujii, T
机构
[1] Dept. of Elec. and Electron. Eng., Toyohashi University of Technology, Tempaku, Toyohashi 441
关键词
D O I
10.1063/1.364687
中图分类号
O59 [应用物理学];
学科分类号
摘要
The magneto-optical (MO) Faraday effect of Bi-substituted yttrium iron garnet (Bi:YIG) films with random multilayer structures is analyzed using the random matrix approach, and the Faraday rotation angles (theta(F)) are examined in comparison with those of periodic multilayer films. The films consist of Bi:YIG films and SiO2 dielectric films, which are stacked randomly (periodically) so as to form the random (periodic) multilayer structures. Similarly to the case of MO Ken effect, a considerable enhancement in theta(F) takes place when the film structure meets the nonreflection condition of light. In particular, theta(F) of the film reaches a maximum of 1.4 degrees/mu m at lambda=1.15 mu m, with the fraction of Bi:YIG layers in the random multilayer film is 41%. This value is about seven times larger than that of a single Bi:YIG film (theta(F)=0.2 degrees/mu m), and cannot be attained with periodic multilayer films. (C) 1997 American Institute of Physics.
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页码:5659 / 5661
页数:3
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