Near-field imaging of pyramid-like nanoparticles at a surface |
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Authors: | V. Lozovski Yu. Nazarok S. I. Bozhevolnyi |
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Affiliation: | a Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Nauki pr. 45, 03650 Kyiv 03028, Ukraine;b Institute of Physics, University of Aalborg, Pontoppidanstraede 103, Aalborg Ost, DK9220, Denmark |
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Abstract: | An exact analytical solution of the self-consistent equation for the local field is used to calculate the near-field optical images of pyramid-like nano-objects placed at a surface of a solid. The diagram method developed previously for near-field image formation is generalized in order to describe layered objects, which are treated as many-body systems. The near-field optical images of triangular and square pyramids are calculated for the illumination configuration as well as those of triangular and square prisms. It is found that the near-field images of nanoparticles having the dielectric constant close to that of the substrate change rapidly and in a complicated manner with the probe–sample distance. |
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Keywords: | Near-field imaging Self-consistent field Pyramid-like object Nanoparticles |
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