Resonant magneto-optic Kerr effects of a single Ni nanorod in the Mie scattering regime
Resonant magneto-optic Kerr effects of a single Ni nanorod in the Mie scattering regime
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DOI：
10.1364/oe.24.016904
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发表时间：
2016-07-25
期刊：
影响因子：
3.8
通讯作者：
Seo, Min-Kyo
中科院分区：
文献类型：
--
作者：
Jeong, Ho-Jin;Kim, Dongha;Seo, Min-Kyo
我们提出了一个系统的，理论研究的极性磁光（MO）克尔效应的一个单一的镍纳米棒在米氏制度。的MO克尔旋转，椭圆率，振幅比，和相移计算作为纳米棒的长度和宽度的函数。当纳米棒在与入射光正交的偏振态中支持等离子体共振时，MO克尔效应的电场振幅比局部最大化。由入射光直接诱导的等离子体激元共振不会提高振幅比。在米氏制度，多个局部极大值的MO克尔活动的支持与不同的模式特性的共振模式。从一阶微扰分析的观点来看，入射光感应电场和绿色函数之间的空间重叠决定了局部极大值。(C)2016美国光学学会
We present a systematic, theoretical investigation of the polar magneto-optical (MO) Kerr effects of a single Ni nanorod in the Mie regime. The MO Kerr rotation, ellipticity, amplitude ratio, and phase shift are calculated as a function of the length and width of the nanorod. The electric field amplitude ratio of the MO Kerr effect is locally maximized when the nanorod supports a plasmonic resonance in the polarization state orthogonal to the incident light. The plasmonic resonances directly induced by the incident light do not enhance the amplitude ratio. In the Mie regime, multiple local maxima of the MO Kerr activity are supported by the resonant modes with different modal characteristics. From the viewpoint of first-order perturbation analysis, the spatial overlap between the incident-light-induced electric field and the Green function determines the local maxima. (C) 2016 Optical Society of America