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Spectral dependence of the magnetic modulation of surface plasmon polaritons in noble/ferromagneticoble metal films

机译:贵金属/铁磁/贵金属膜中表面等离激元极化子的磁调制的光谱依赖性

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摘要

The magnetic field is an interesting candidate for the development of active plasmonic devices as it is able to modify the surface plasmon polariton (SPP) wave vector. Both real and imaginary parts of the SPP wave vector are affected. Here, we have experimentally determined the contribution of both modulations in the spectral range λ.0 = 500-1000 nm for magnetoplasmonic systems consisting of noble/ferromagneticoble multilayered metal films. We have seen that the real part usually exceeds the imaginary one, but in the longer wavelength range the contribution of the imaginary part cannot be neglected. We have analyzed the spectral dependency of the modulation, and we conclude that it is dominated by the evolution of the SPP properties with wavelength and not the magneto-optical parameter. A figure of merit including modulation and propagation distance is also studied for the three ferromagnetic metals, Fe, Co, and Ni.
机译:磁场是有源等离子体激元器件发展的有趣候选者,因为它能够修改表面等离子体激元(SPP)波矢量。 SPP波矢量的实部和虚部都会受到影响。在这里,我们已经实验确定了由贵金属/铁磁/贵金属多层金属膜组成的磁等离子体系统在光谱范围λ.0= 500-1000 nm中两种调制的贡献。我们已经看到,实部通常超过虚部,但是在更长的波长范围内,虚部的贡献不能忽略。我们已经分析了调制的频谱相关性,并得出结论认为,它是由SPP属性随波长而不是磁光参数的演化决定的。还研究了三种铁磁金属Fe,Co和Ni的品质因数,包括调制和传播距离。

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