Spectroscopic Ellipsometry of Yttrium–Iron Garnet Thin Films Containing Gold Nanoparticles
Spectroscopic Ellipsometry of Yttrium–Iron Garnet Thin Films Containing Gold Nanoparticles
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含金纳米粒子的钇铁石榴石薄膜的光谱椭圆光度法
DOI：
10.1143/jjap.46.l1032
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发表时间：
2007
影响因子：
1.5
通讯作者：
N. Nabatova
中科院分区：
文献类型：
--
作者：
S. Tomita;M. Fujii;S. Hayashi;Asuka Terai;N. Nabatova
我们报道了含Au纳米颗粒的钇铁石榴石薄膜的复介电函数（ε）。使用具有后退火的共溅射方法制备膜。在近红外到紫外光的光子能量范围内，利用椭圆偏振光谱法获得了薄膜ε的真实的实部和虚部。清晰地观察到Re[ε]在可见光区的异常色散，其起源于Au纳米颗粒的局域表面等离子体。讨论了ε对纳米复合薄膜磁光克尔特性的影响。
We report complex dielectric function (ε) for yttrium–iron garnet thin films containing Au nanoparticles. Films are prepared using a co-sputtering method with post-annealing. Real and imaginary parts of ε of the films are obtained using spectroscopic ellipsometry in a photon energy region from near-infrared to ultra-violet. An anomalous dispersion of Re[ε] in the visible region originating from localized surface plasmon of Au nanoparticles is clearly observed. The influence of ε on the magneto-optical Kerr properties of the nanocomposite films is discussed.