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arXiv 1801.09690cond-mat.mes-hall
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高折射率介电纳米结构对稀土掺杂薄膜电、磁偶极跃迁的增强

Enhancement of electric and magnetic dipole transition of rare-earth doped thin films tailored by high-index dielectric nanostructures

Peter R. Wiecha, Clément Majorel, Christian Girard, Arnaud Arbouet, Bruno Masenelli, Olivier Boisron, Aurélie Lecestre, Guilhem Larrieu, Vincent Paillard, Aurélien Cuche

摘要:

我们提出了一种简单的实验技术,使用几纳米稀土离子掺杂团簇薄膜,分别绘制靠近单个介电纳米结构的电偶极和磁偶极跃迁的发射。稀土离子提供类似量级的电偶极跃迁和磁偶极跃迁。通过记录由聚焦激光束激发的沉积层的光致发光,我们能够同时映射单个纳米结构上的电和磁发射增强。尽管是一个衍射限制的远场方法,空间分辨率为几百纳米,我们的方法呼吁其简单性和高信噪比。我们证明了我们的技术在单硅纳米棒和二聚体的例子,在其中我们发现一个显着的分离的电和磁近场的贡献。我们的方法为复杂光子纳米结构的电和磁光学响应的有效和快速表征铺平了道路。

英文摘要:

We propose a simple experimental technique to separately map the emission from electric and magnetic dipole transitions close to single dielectric nanostructures, using a few nanometer thin film of rare-earth ion doped clusters. Rare-earth ions provide electric and magnetic dipole transitions of similar magnitude. By recording the photoluminescence from the deposited layer excited by a focused laser beam, we are able to simultaneously map the electric and magnetic emission enhancement on individual nanostructures. In spite of being a diffraction-limited far-field method with a spatial resolution of a few hundred nanometers, our approach appeals by its simplicity and high signal-to-noise ratio. We demonstrate our technique at the example of single silicon nanorods and dimers, in which we find a significant separation of electric and magnetic near-field contributions. Our method paves the way towards the efficient and rapid characterization of the electric and magnetic optical response of complex photonic nanostructures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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