High-Efficiency Second Harmonic Generation from a Single Hybrid ZnO Nanowire/Au Plasmonic Nano-Oligomer
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- 作者：Gustavo Grinblat ; Mohsen Rahmani ; Emiliano Cort茅s ; Mart铆n Caldarola ; David Comedi ; Stefan A. Maier ; Andrea V. Bragas
- 刊名：Nano Letters
- 出版年：2014
- 出版时间：November 12, 2014
- 年：2014
- 卷：14
- 期：11
- 页码：6660-6665
- 全文大小：387K
- ISSN：1530-6992
文摘
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 鈭? 脳 10鈥?%, which is among the highest values for a nanoscale object at optical frequencies reported so far. The SH intensity was found to be 鈭?700 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.