Shaping the Emission Spectral Profile of Quantum Dots with Periodic Dielectric and Metallic Nanostructures
Shaping the Emission Spectral Profile of Quantum Dots with Periodic Dielectric and Metallic Nanostructures
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DOI：
10.1002/adom.201300354
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发表时间：
2014-01
影响因子：
9
通讯作者：
Zhangkai Zhou;D. Lei;Jiaming Liu;Xin Liu;Jiancai Xue;Qiangzhong Zhu;Huanjun Chen;Tianran Liu;Yinyin Li;Hongbo Zhang;Xuehua Wang
中科院分区：
文献类型：
--
作者：
Zhangkai Zhou;D. Lei;Jiaming Liu;Xin Liu;Jiancai Xue;Qiangzhong Zhu;Huanjun Chen;Tianran Liu;Yinyin Li;Hongbo Zhang;Xuehua Wang
使用基于阳极氧化铝模板的电介质和等离子体纳米结构可以显著地成形和改变半导体量子点的发射轮廓和寿命动力学。当量子点沉积在原始的阳极氧化铝模板上时，观察到量子点的光致发光的显着的光谱修改和大的总衰减速率增强。修改后的发射光谱轮廓与计算的阳极氧化铝模板表面上方的光子局域态密度一致，表明这种有趣的光谱调谐现象源于阳极氧化铝模板所支持的表面电磁模式。此外，当阳极氧化铝模板负载有维持等离子体共振的金属纳米线时，量子点的光致发光可以大大增强。这些前所未有的结果表明，阳极氧化铝模板可以用作在未来的光子和光电应用中定制量子发射体的光致发光特性的通用平台。
The emission profile and lifetime dynamics of semiconductor quantum dots can be significantly shaped and altered using dielectric and plasmonic nanostructures based on anodic aluminum oxide templates. Remarkable spectral modification and a large total decay rate enhancement in the photoluminescence of quantum dots are observed when they are deposited on a pristine anodic aluminum oxide template. The modified emission spectral profile is consistent with the calculated photonic local density of states above the anodic aluminum oxide template surface, suggesting that this interesting spectral tuning phenomenon stems from the surface electromagnetic modes supported by the anodic aluminum oxide template. Furthermore, when the anodic aluminum oxide template is loaded with metallic nanowires that sustain plasmon resonances, the photoluminescence of the quantum dots can be largely enhanced. These unprecedented results suggest that the anodic aluminum oxide template can be used as a versatile platform for tailoring the photoluminescence properties of quantum emitters in future photonic and optoelectronic applications.