Abstract
This paper attempts to answer the question of 'how to explain the image of photon scanning tunneling microscope (PSTM)'. To explain the image of PSTM, the essential difficulty is the false image information within the complex image of the topographical image and refractive index image of sample. In this paper, we have derived the PSTM imaging formula and introduced the eliminating false image information method and image separating method, and discussed the key to super-resolution of near-field optical microscopy. Numerical simulation and experiments with the method of perturbation diffraction combined with (pi) - symmetric lighting eliminating false image information are provided.
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