Facilitated tip-enhanced Raman scattering by focused gap-plasmon hybridization  

作　　者：HOUKAI CHEN YUQUAN ZHANG YANMENG DAI CHANGJUN MIN SIWEI ZHU XIAOCONG YUAN 

机构地区：[1]Nanophotonics Research Center,Shenzhen Key Laboratory of Micro-Scale Optical Information Technology,Shenzhen University,Shenzhen 518060,China [2]Tianjin Union Medical Center,Tianjin 300121,China

出　　处：《Photonics Research》2020年第2期103-109,共7页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(61427819,91750205,11774256,61805154,61605117);Natural Science Foundation of Guangdong Province(2016A030312010);Leading Talents Program of Guangdong Province(00201505);Science and Technology Innovation Commission of Shenzhen(KQTD2017033011044403,ZDSYS201703031605029,JCYJ20180305125209538,JCYJ2017818144338999)。

摘　　要：Tip-enhanced Raman scattering(TERS)spectroscopy is a nondestructive and label-free molecular detection approach that provides high sensitivity and nanoscale spatial resolution.Therefore,it has been used in a wide array of applications.We demonstrate a gap-plasmon hybridization facilitated by a bottom-illuminated TERS configuration.The gap-plasmon hybridization effect is first performed with the finite-difference time-domain method to optimize the parameters,and experiments are then conducted to calibrate the performance.The results demonstrate an enhancement factor of 1157 and a spatial resolution of 13.5 nm.The proposed configuration shows great potential in related surface imaging applications in various fields of research.

关 键 词：scattering PLASMON finite 

分 类 号：O657.37[理学—分析化学]