Optical response of finite-thickness ultrathin plasmonic films
Optical response of finite-thickness ultrathin plasmonic films
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DOI：
10.1557/mrc.2018.153
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发表时间：
2018-06
影响因子：
1.9
通讯作者：
I. Bondarev;Hamze Mousavi;V. Shalaev
中科院分区：
文献类型：
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作者：
I. Bondarev;Hamze Mousavi;V. Shalaev
我们表明，有限的横向尺寸和厚度的非金属薄膜的光学响应可以具有独特的磁光效应所产生的电子运动的空间限制。特别是，膜的磁导率的频率依赖性表现出尖锐的共振结构，随着膜的纵横比增加而向红色偏移。在适当的调谐下，该膜在IR频率范围内也可以是负折射的。我们表明，这些磁光性能可以通过调整薄膜的化学成分，等离子体材料的质量，纵横比，和周围的薄膜控制。
We show that the optical response of ultrathin metallic films of finite lateral size and thickness can feature peculiar magneto-optical effects resulting from the spatial confinement of the electron motion. In particular, the frequency dependence of the magnetic permeability of the film exhibits a sharp resonance structure shifting to the red as the film aspect ratio increases. The films can also be negatively refractive in the IR frequency range under proper tuning. We show that these magneto-optical properties can be controlled by adjusting the film chemical composition, plasmonic material quality, the aspect ratio, and the surroundings of the film.