Plasmon-Mediated Whispering-Gallery-Mode Emission from Quantum-Dot-Coated Gold Nanosphere,The Journal of Physical Chemistry C

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Plasmon-Mediated Whispering-Gallery-Mode Emission from Quantum-Dot-Coated Gold Nanosphere
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2015-10-29 00:00:00 , DOI: 10.1021/acs.jpcc.5b07475
Xianguang Yang ₁ , Dinghua Bao ₁ , Baojun Li ₁

Affiliation

Plasmons of gold nanostructures provide a powerful tool to enhance exciton–exciton coupling and energy transfer at spherical geometry, while quantum dots have confined excitons with strong optical oscillator strength and gain. Here, we report a plasmon-mediated whispering-gallery-mode emission from CdSe-ZnS quantum dot-coated gold nanosphere at room temperature. The whispering-gallery-mode emissions with different gold nanosphere sizes have been studied. Polarization-dependent emission is observed and explained. The decay dynamics of radiative emission is investigated by analyzing the photoluminescence decay spectrum. The underlying physical mechanism of the measured interference rings is further investigated by spatial distribution of photoluminescence intensity.

中文翻译：

量子点涂层金纳米球的等离子介导的回音壁模式发射。

金纳米结构的等离激元提供了一个强大的工具，可以增强激子-激子的耦合和球形几何体的能量传递，而量子点则将激子限制在具有强大的光学振荡器强度和增益的情况下。在这里，我们报告在室温下从CdSe-ZnS量子点涂层金纳米球的等离激元介导的耳语画廊模式发射。研究了不同金纳米球尺寸的耳语画廊模式发射。观察并解释了偏振相关的发射。通过分析光致发光衰减光谱，研究了辐射发射的衰减动力学。通过光致发光强度的空间分布进一步研究了所测干涉环的潜在物理机制。

更新日期：2015-10-29

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