Open AccessHigh-resolution imaging of graphene by tip-enhanced coherent anti-Stokes Raman scattering
Author(s) -
Xiaolong Kou,
Qian Zhou,
Dong Wang,
Jipei Yuan,
Xiaohong Fang,
LiJun Wan
Publication year - 2019
Publication title -
journal of innovative optical health sciences/journal of innovation in optical health science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 24
eISSN - 1793-5458
pISSN - 1793-7205
DOI - 10.1142/s1793545818410031
Subject(s) - raman scattering , graphene , raman spectroscopy , resolution (logic) , coherence (philosophical gambling strategy) , coherent anti stokes raman spectroscopy , optical coherence tomography , optics , materials science , scattering , image resolution , nanotechnology , physics , computer science , artificial intelligence , quantum mechanics
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 difficulties, 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[Formula: see text]nm, which has ever been reported. The highest EF[Formula: see text] 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.