2 November 2011 Properties of the near field interactions produced by spherical nanoparticles
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Abstract
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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J. M. Merlo, J. F. Aguilar, H. González-Hernández, N. A. Caballero, "Properties of the near field interactions produced by spherical nanoparticles", Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 801141 (2 November 2011); doi: 10.1117/12.903412; https://doi.org/10.1117/12.903412
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