Abstract
We propose an approach that uses a conventional optical microscope to achieve optical super-resolution. This approach will provide a direct, non-invasive, and far-field access in the observation of both metallic and non-metallic objects with a spatial resolution of tens-of-nanometres, achieved in a single snap shot. This method, combines near-field illumination by the micro-fiber and a passive spatial frequency shift by the sample itself, offering a promising approach to surface tomography imaging without localized field enhancement by surface plasmon polaritons. Our results present the potential of breaking the diffractive barrier using a conventional wide-field optical microscope within the visible spectrum.
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