KEYWORDS: Particles, Spherical lenses, Nanoparticles, Near field optics, Near field, Dielectrics, Prisms, Microscopes, Refractive index, Radio propagation
In the aim to understand the nature of the propagation of an electromagnetic field in
the near region, we study the interactions between an evanescent field and two
different samples of spherical dielectric nanoparticles, i.e. a set of five particles and
a single one. Each sample was studied in separated experiments. This is made by
using a Photon Scanning Tunneling Microscope (PSTM) in the constant distance
mode. We also analyze the obtained images and determine that the optical images
show mainly interference between the evanescent field and the reflected field on the
surface of the nanoparticles. Finally, we found that the perturbation of the
evanescent field, produced by imperfections on the substrate, is negligible in
comparison with the interactions intensity.
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