Magnetization-induced second- and third-harmonic generation in magnetic thin films and nanoparticles
Magnetization-induced second- and third-harmonic generation in magnetic thin films and nanoparticles
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DOI：
10.1364/josab.22.000138
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发表时间：
2005-01-01
影响因子：
1.9
通讯作者：
Lifshits, VG
中科院分区：
文献类型：
--
作者：
Aktsipetrov, OA;Murzina, TV;Lifshits, VG
综述了近年来磁性纳米结构中磁化诱导的二阶和三阶非线性光学效应的实验研究结果。研究了磁性纳米颗粒薄膜、石榴石纳米粒子自组装薄膜、磁性金属薄膜和稀土离子Langmuir-Blodgett薄膜中二次谐波强度、极化态和相对相位的磁化诱导变化。在磁性薄膜和颗粒薄膜的二次谐波产生（SHG）中，非线性磁光克尔效应（NOMOKE）超过线性磁光克尔效应至少一个数量级。在磁性金属薄膜和纳米颗粒薄膜中观察到磁化诱导的光学三次谐波（THG）。从这些磁性纳米结构中发现的THG中的NOMOKE与SHG中的二阶NOMOKE具有相同的数量级。在CoxAg（(1-x)）纳米颗粒薄膜中，THG强度下的NOMOKE磁对比度高达0.1。对于THG波，Fe（110）薄膜的磁化诱导极化旋转可达10度，Co薄膜的相对相移可达70度。磁化诱导的二次和三次非线性光学效应的研究表明，磁性纳米材料的磁性、结构和磁光性质之间存在着相互联系。(C) 2005年美国光学学会。
The results of our recent experimental studies of magnetization-induced second- and third-order nonlinear optical effects in magnetic nanostructures are surveyed. Magnetization-induced variations of the intensity, the polarization state, and the relative phase of the second-harmonic wave are studied in magnetic nanogranular films, self-assembling films with garnet nanoparticles, thin magnetic metal films, and Langmuir-Blodgett films containing rare-earth ions. The nonlinear magneto-optical Kerr effect (NOMOKE) in second-harmonic generation (SHG) from thin magnetic and granular films is shown to exceed the linear magneto-optical Kerr effect by at least 1 order of magnitude. Magnetization-induced optical third-harmonic generation (THG) is observed in thin magnetic metal films and nanogranular films. The NOMOKE in THG from these magnetic nanostructures appears to be of the same order of magnitude as the second-order NOMOKE in SHG. The NOMOKE magnetic contrast in the THG intensity is up to similar to0.1 in CoxAg((1-x)) nanogranular films. For the THG wave, the magnetization-induced rotation of polarization is up to 10degrees in thin Fe(110) films, and the relative phase shift is up to 70degrees in thin Co films. The studies of the magnetization-induced quadratic and cubic nonlinear-optical effects show the interconnection between the magnetic, structural, and magneto-optical properties of magnetic nanomaterials. (C) 2005 Optical Society of America.