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A scanning near-field optical microscope using uncoated fiber tip is described, which can work in transmission and reflection configurations, both capable of working in illumination and collection-mode, so that either transparent or opaque sample can be investigated. Depending on different applications, either constant-gap or constant-height images can be achieved. A compact homemade translator permits to select interested area of sample in the range of 4 mm×4 mm. Working in the constant-height as well as transmission and collection-mode configuration, several kinds of samples such as holographic grating, liposome and zeolite were investigated. The experimental results revealed the dependence of the optical resolution of the SNOM on the tip-sample separation.
A scanning near-field optical microscope using uncoated fiber tip is described, which can work in transmission and reflection configurations, both capable of working in illumination and collection-mode, so that either either transparent or opaque sample can be investigated. either constant-gap or constant-height images can be achieved. A compact homemade translator permits to select interested area of sample in the range of 4 mm × 4 mm. Working in the constant-height as well as transmission and collection-mode configuration, The experimental results revealed the dependence of the optical resolution of the SNOM on the tip-sample separation.