High-resolution imaging of graphene by tip-enhanced coherent anti-Stokes Raman scattering  

作　　者：Xiaolong Kou Qian Zhou Dong Wang Jinghe Yuan Xiaohong Fang Lijun Wan 

机构地区：[1]CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of Chemistry Chinese Academy of Science Beijing 100190,P.R.China

出　　处：《Journal of Innovative Optical Health Sciences》2019年第1期39-45,共7页创新光学健康科学杂志（英文）

基　　金：We gratefully acknowledge the support from the National Natural Science Foundation of China(Nos.21735006 and 21127901),and the CAS Key Technology Talent Program.

摘　　要：Coherent anti-Stokes Raman scattering(CARS)is able to enhance molecular signals by vibrational coherence compared to weak Raman signal.The surface or tip enhancement are successful technologies,which make it possible for Raman to detect single molecule with nanometer resolution.However,due to technical diffculties,tip-enhanced CARS(TECARS)is not as successful as expected.For single molecular detection,high sensitivity and resolution are two main challenges.Here,we reported the first single atom layer TECARS imaging on Graphene with the highest resolution about 20 nm,which has ever been reported.The highest EF_(TECARS/CARS) is about 10^(4),the similar order of magnitude with SECARS(EF of tip is usually smaller than that of substrates).Such resolution and sensitivity is promising for medical,biology and chemical applications in the future.

关 键 词：Tip-enhanced coherent anti-Stokes Raman scattering CARS GRAPHENE 

分 类 号：O43[机械工程—光学工程]