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首页> 外文期刊>Applied optics >Enhancement of electric and magnetic dipole transition of rare-earth-doped thin films tailored by high-index dielectric nanostructures
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Enhancement of electric and magnetic dipole transition of rare-earth-doped thin films tailored by high-index dielectric nanostructures

机译：高指数介电纳米结构裁剪稀土掺杂薄膜的电和磁偶极膜的增强

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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 dusters. 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 dieters, 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. (C) 2019 Optical Society of America
机译：我们提出了一种简单的实验技术，将来自电偶极纳米结构的电磁偶极转变分别分别地映射发射，使用几纳米薄膜的稀土离子掺杂的粉碎机。稀土离子提供相似幅度的电和磁性偶极转变。通过从聚焦激光束激发的沉积层从沉积层记录光致发光，我们能够同时立即映射各个纳米结构上的电磁性发射增强。尽管是具有几百纳米的空间分辨率的衍射限制的远场方法，但​​我们的方法通过其简单性和高信噪比吸引。我们在单一硅纳米棒和节食师的示例中展示了我们的技术，其中我们发现电动和磁性近场贡献的显着分离。我们的方法铺平了复杂光子纳米结构的电磁光学响应的​​有效和快速表征的方式。 （c）2019年光学学会

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