Anomalous Shift Behaviors in the Photoluminescence of Dolmen-Like Plasmonic Nanostructures
Anomalous Shift Behaviors in the Photoluminescence of Dolmen-Like Plasmonic Nanostructures
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DOI：
10.1021/acsphotonics.6b00058
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发表时间：
2016-05
期刊：
影响因子：
7
通讯作者：
Tingting Yin;Zhaogang Dong;Liyong Jiang;Lei Zhang;Hailong Hu;C. Qiu;Joel K. W. Yang;Zexiang Shen
中科院分区：
文献类型：
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作者：
Tingting Yin;Zhaogang Dong;Liyong Jiang;Lei Zhang;Hailong Hu;C. Qiu;Joel K. W. Yang;Zexiang Shen
金属纳米结构上的局域表面等离子体共振（LSPR）能够显著增强光致发光（PL）发射。然而，迄今为止，金属纳米结构的PL发射峰相对于相应的散射光谱的异常蓝移的机制仍然不清楚。在本文中，我们提出了详细的研究与蓝移峰的Lorentz类和Fano类的光致发光曲线几乎没有移动的下降，观察到的dolmen类金属纳米结构。这种异常的PL发射轮廓是具有洛伦兹-/法诺样轮廓的等离子体激元态（DoPS）密度和弛豫期间弛豫集体自由电子的布居分布的产物。更具体地说，这些集体自由电子的快速弛豫过程有助于类洛伦兹和类法诺发射轮廓的PL移位特性。我们相信，我们的研究结果提供了一个一般坚实的基础和指导，分析和人类的。
Localized surface plasmon resonance (LSPR) on metallic nanostructures is able to enhance photoluminescence (PL) emission significantly. However, the mechanism for anomalous blue-shifted peak of PL emission from metallic nanostructures, relative to the corresponding scattering spectra, is still unclear so far. In this paper, we presented the detailed investigations on both the Lorentz-like PL profile with blue-shifted peak and Fano-like one with almost unshifted dip, as observed on dolmen-like metallic nanostructures. Such anomalous PL emission profile is the product of the density of plasmon states (DoPS) with Lorentz-/Fano-like profile and the population distribution of the relaxed collective free electrons during relaxation. To be more specific, the fast relaxation process of these collective free electrons contributes to the PL shifting characteristics of both Lorentz-like and Fano-like emission profiles. We believed that our results provide a general solid foundation and guidance for analyzing and man...