Soganci Ibrahim M, Nizamoglu Sedat, Mutlugun Evren, Akin Onur, Demir Hilmi V
Opt Express. 2007 Oct 29;15(22):14289-98. doi: 10.1364/oe.15.014289.
Using metallic nanoislands, we demonstrate the localized plasmonic control and modification of the spontaneous emission from closely-packed nanocrystal emitters, leading to significant changes in their collective emission characteristics tuned spectrally and spatially by plasmon coupling. Using randomly-distributed silver nanoislands, we show that the emission linewidth of proximal CdSe/ZnS core-shell quantum dots is reduced by 22% and their peak emission wavelength is shifted by 14nm, while their ensemble photoluminescence is enhanced via radiative energy transfer by 21.6 and 15.1 times compared to the control groups of CdSe/ZnS nanocrystals with identical nano-silver but no dielectric spacer and the same nanocrystals alone, respectively.
利用金属纳米岛，我们展示了对紧密堆积的纳米晶体发射体的自发发射进行局部等离子体控制和修饰，通过等离子体耦合在光谱和空间上调节其集体发射特性，从而带来显著变化。使用随机分布的银纳米岛，我们发现，与具有相同纳米银但没有介电间隔层的CdSe/ZnS纳米晶体对照组以及单独的相同纳米晶体相比，近端CdSe/ZnS核壳量子点的发射线宽减小了22%，其峰值发射波长偏移了14nm，同时其整体光致发光通过辐射能量转移分别增强了21.6倍和15.1倍。
