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15 October 2004 Coherent anti-Stokes Raman spectroscopy for nano-imaging with a metallic near-field probe
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Abstract
A metallic nano-probe has locally induced coherent anti-Stokes Raman scattering (CARS) of adenine molecules in a nanometric DNA network structure. The excitation fields and CARS polarization are enhanced by the tip apex of the nano-probe through the excitation of local surface plasmons. Owing to the third-order nonlinearity, the excitation of the CARS polarization is extremely confined to the end of the tip apex, resulting in the spatial resolution far beyond the diffraction limit of light. Our CARS microscope using a silver-coated probe visualized the DNA network structure at a specific vibrational frequency (~1337 cm-1) of adenine molecules with a spatial resolution of ~15 nm and sufficient sensitivity.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Satoshi Kawata, Taro Ichimura, Norihiko Hayazawa, Mamoru Hashimoto, and Yasushi Inoue "Coherent anti-Stokes Raman spectroscopy for nano-imaging with a metallic near-field probe", Proc. SPIE 5516, Nonlinear Optical Transmission and Multiphoton Processes in Organics II, (15 October 2004); https://doi.org/10.1117/12.564283
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