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In near-field scanning optical microscopy (NSOM), optical images are calculated for flat-surface samples with an optical index distribution. This makes it possible to estimate NSOM images that are free from perturbations in the topographical information of the sample. A realistic NSOM is simulated, including an aperture probe and a three-dimensional field. The calculations reveal the imaging characteristics...
We analyze how the interaction between the probe and the field near the sample surface affects the characteristics of the images produced by a near-field scanning optical microscope. The numerical calculation is carried out using the finite-difference time-domain method, and a three-dimensional model that includes a probe of arbitrary shape is considered. Assuming an aperture-type probe (collection-mode...
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