| 叠层圆柱台表面等离激元器件的共振特性 |
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| 引用本文： | 朱振东,白本锋,谭峭峰,李群庆,王雪深,高思田.叠层圆柱台表面等离激元器件的共振特性[J].红外与激光工程,2017,46(9):934001-0934001(6). |
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| 作者姓名： | 朱振东 白本锋 谭峭峰 李群庆 王雪深 高思田 |
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| 作者单位： | 1.中国计量科学研究院,北京 100029; |
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| 基金项目： | 国家质量基础的共性技术研究与应用项目（2017YFF0206104）;国防科技委创新项目（H86304ZT00102902） |
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| 摘 要： | 基于金属纳米结构增强光与物质的相互作用，调控光学响应是光学前沿研究。金属纳米结构能显著增强电磁场和热点空间位置调控，是表面等离激元器件应用的关键。借鉴衍射光学元件设计思想，文中提出一种简单的多尺度叠层圆柱台（double stacked nanocone，DSC）金属纳米结构，实现近/远场深度调控。在给定激发条件下，DSC纳米结构中腔模与局域表面等离激元模式间产生杂化，实现多尺度级联场增强，远场响应也得到有效调制，且热点能有效地定位到纳米结构的上表面。进一步，提出并研究了掩模重构的纳米加工方法，低成本、可控地制备了DSC纳米结构，工艺控制是三台阶DSC器件特性的关键，实验结果与理论设计一致。
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| 关 键 词： | 表面等离激元 杂化 多尺度纳米结构 调控 |
| 收稿时间： | 2017-07-05 |
Resonance property of the surface plasmonic device of double stacked nanocone |
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| Affiliation: | 1.National Institute of Metrology,China,Beijing 100029,China;2.Institute of Optoelectronics Engineering,State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision,Tsinghua University,Beijing 100084,China |
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| Abstract: | Metallic nanostructures can enhance light-matter interaction arising from the surface plasmonic resonances, which is highlight on optics for many applications. A tunable optical property can be induced by plasmonic resonance, leading to the significant electromagnetic field enhancement, as well as the position of the hot spot at a tiny nanogap. Analogue of the diffractive optics, an alternative method of multiscale cascaded field enhancement with a simple metallic nanostructure, double stacked nanocone (DSC), was proposed in the article. In detail, a tunable hybrid mode was achieved from the strong interference between a fundamental plasmonic cavity mode and a plasmonic gap mode. Furthermore, it led to a far-field optical response at a certain wavelength. The position of the hot spots can also be mounted on the top surface of the DSC nanostructure. Additionally, a technique of mask reconfiguration was developed to precisely fabricate the multiscale DSC nanostructure, which can benefit to construct the necessary three steps in the nanostructure. The experimental results also provide a substantial evidence to demonstrate the art-of-state of the multiscale cascaded field enhancement, as well as the technique of nanofabrication. |
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