High-Efficiency Second Harmonic Generation from a Single Hybrid ZnO Nanowire/Au Plasmonic Nano-Oligomer
High-Efficiency Second Harmonic Generation from a Single Hybrid ZnO Nanowire/Au Plasmonic Nano-Oligomer
复制标题
DOI：
10.1021/nl503332f
复制
发表时间：
2014-11-01
期刊：
影响因子：
10.8
通讯作者：
Bragas, Andrea V.
中科院分区：
文献类型：
--
作者：
Grinblat, Gustavo;Rahmani, Mohsen;Bragas, Andrea V.
我们介绍了一个等离子体-半导体混合纳米系统，由氧化锌纳米线耦合到金五聚体低聚物通过交叉热点。它表明，混合系统表现出的二次谐波（SH）转换效率为3 × 10（-5）%，这是迄今为止报道的光学频率的纳米级物体的最高值之一。SH强度被发现是类似的1700倍以上，从相同的纳米线激发的热点外。将高非线性极化率材料精确地放置在等离子体激元限定场区域中以增强SH生成为纳米尺度上的高效光频率上转换开辟了新的前景。
We introduce a plasmonic-semiconductor hybrid nanosystem, consisting of a ZnO nanowire coupled to a gold pentamer oligomer by crossing the hot-spot. It is demonstrated that the hybrid system exhibits a second harmonic (SH) conversion efficiency of similar to 3 x 10(-5)%, which is among the highest values for a nanoscale object at optical frequencies reported so far. The SH intensity was found to be similar to 1700 times larger than that from the same nanowire excited outside the hot-spot. Placing high nonlinear susceptibility materials precisely in plasmonic confined-field regions to enhance SH generation opens new perspectives for highly efficient light frequency up-conversion on the nanoscale.