High-speed Scanning Near-field Optical Microscopy

Scanning near-field optical microscopy (SNOM) has been recognized as a powerful technique for super-resolution optical imaging [1]. It has been even more unique compared with other super-resolution fluorescent imaging techniques because it utilizes near-field light at a metallic tip as a nanolight-source, which realizes super-resolution not only in fluorescence but also in any other optical signals such as Raman scattering, infrared absorption and photoluminescence.