Ordered Gold Nanobowl Arrays as Substrates for Surface-Enhanced Raman Spectroscopy  

作　　者：CHEN Ling LIU Fan-Xin ZHAN Peng PAN Jian WANG Zhen-Lin 陈玲;刘凡新;詹鹏;潘剑;王振林(National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093)

机构地区：[1]National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093

出　　处：《Chinese Physics Letters》2011年第5期249-252,共4页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China,the National Natural Science Foundation of China under Grant Nos 10734010,50771054 and 10804044;the Jiangsu-Provincial Planned Projects for Postdoctoral Research Funds under Grant No 0901015B.

摘　　要：We demonstrate that an interlinked gold half-shell array fabricated by metal deposition on a sacrificial twodimensional colloidal crystal template can show a large enhancement in surface-enhanced Raman spectroscopy at its main transmission resonance.It isfurther observed that Raman signal enhancement shows a noticeable difference when reversing the orientations of the Au nanobowls in relation to the underlying flat dielectric substrate.As the pump laser wavelength is tuned in the vicinity of the resonant plasmonic mode of the structure,the nhancement on an upward Au nanobowl array can be five-fold compared to that on a downward one.Numerical simulation confirms that for the upward nanobowls,a strong localized mode inside the Au nanobowls is formed at the resonant excitation wavelength,which helps to explain this observed extra enhancement in Raman scattering.

关 键 词：PUMP RESONANT mode 

分 类 号：TN2[电子电信—物理电子学]