Selectively enhanced Raman scattering with triple-resonance nanohole arrays
Selectively enhanced Raman scattering with triple-resonance nanohole arrays
复制标题
利用三共振纳米孔阵列选择性增强拉曼散射
DOI：
10.1016/j.optcom.2019.07.074
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发表时间：
2019-12
影响因子：
2.4
通讯作者：
Yiping Cui
中科院分区：
文献类型：
--
作者：
Changgui Lu;Zhengqing Qi;Xuefang Hu;Zhenhua Ni;Yiping Cui
表面增强拉曼散射（Sers）已被广泛应用于实现拉曼散射的显著增强，而大多数Sers基底在相对宽的光谱范围内增强所有的拉曼信号。选择性增强特定的拉曼位移也是重要的，以便从众多背景分子中直接识别目标分子。在本文中，我们设计了一种在二氧化硅间隔层和银膜上具有周期性银纳米孔的Sers基底。该基片具有三种共振模式，分别由纳米孔的局域表面等离子体共振（LSPR）、周期孔的表面等离子体激元（SPP）和银膜反射镜与纳米孔之间的法布里-珀罗（FP）共振激发。这些共振模式之间的相互作用导致更高的Q因子，这将适用于选择性拉曼增强。实验结果表明，三重共振基片的拉曼信号在三重共振基片的激发频率和两个选定的拉曼频率下，比在石英基片上周期性银纳米孔的单共振基片的拉曼信号增强了10倍。同时，匹配的两个选择的拉曼信号可以被增强约三倍大于失配的。因此，同时考虑两个选择性增强的拉曼信号有助于将分子识别提高约一个数量级。这种选择性增强特性为不需要光谱光度系统而直接识别目标分子提供了一种潜在的方法。
Surface-enhanced Raman scattering (SERS) has been widely used to realize considerable enhancement of Raman scattering, while most SERS substrates enhance all the Raman signals in a relative wide spectral range. Selective enhancement of specific Raman shifts is also important in order to directly identify a target molecule from numerous background ones. In this paper, we design a SERS substrate with periodic silver nanoholes on silica spacer and silver film. The substrate possesses three resonance modes, which are excited by the localized surface plasmon resonance (LSPR) of nanoholes, the surface plasmon polariton (SPP) of period holes and the Fabry–Perot (FP) resonance between silver film mirror and nanoholes respectively. The interaction between those resonance modes results in higher Q factor, which will be applicable for selective Raman enhancement. With matching the three resonance modes to the exciting frequency and two selected Raman frequencies of R6G (Rhodamine 6G) respectively, experimental results show that the Raman signals with the triple resonance substrate at the matched frequencies can be enhanced ten times larger than the case of periodic silver nanoholes on silica substrate only with single resonance. At the same time, the matched two selected Raman signals can be enhanced about three times larger than the mismatched ones. Therefore, considering the two selectively enhanced Raman signals simultaneously can help to improve the molecule identification about one order of magnitude. This selective enhancement property provides a potential method to directly identify target molecule without spectral spectrophotometry system.
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DOI：
10.1364/josab.26.001569
发表时间：
2009-08
影响因子：
1.9
作者：
V. Giannini;J. Sánchez-gil;O. Muskens;J. Rivas
通讯作者：
V. Giannini;J. Sánchez-gil;O. Muskens;J. Rivas
DOI：
10.1364/josab.30.000338
发表时间：
2013-02-01
影响因子：
1.9
作者：
Laaksonen, Katri;Suomela, Samu;Nieminen, Risto M.
通讯作者：
Nieminen, Risto M.
影响因子：
17.1
作者：
Chu, Yizhuo;Banaee, Mohamad G.;Crozier, Kenneth B.
通讯作者：
Crozier, Kenneth B.
影响因子：
10.8
作者：
Yu, Qiuming;Guan, Phillip;Wallace, Paul M.
通讯作者：
Wallace, Paul M.
影响因子：
6.7
作者：
W. Yue;Zhihong Wang;Yang Yang-Yang;Jingqi Li;Ying Wu;Longqing Chen;B. Ooi;Xianbin Wang;Xixiang Zhang
通讯作者：
W. Yue;Zhihong Wang;Yang Yang-Yang;Jingqi Li;Ying Wu;Longqing Chen;B. Ooi;Xianbin Wang;Xixiang Zhang