Options
Propagation of the electromagnetic field in fully coated near-field optical probes
Auteur(s)
Vaccaro, L.
Aeschimann, L.
Staufer, U.
Date de parution
2003
In
Applied Physics Letters, American Institute of Physics (AIP), 2003/83/3/584-586
Résumé
Fully metal-coated near-field optical probes, based on a cantilever design, have been studied theoretically and experimentally. Numerical simulations prove that these structures allow nonzero modal emission of the electromagnetic field through a 60-nm-thick metallic layer, that is opaque when deposited on flat substrates. The far-field intensity patterns recorded experimentally correspond to the ones calculated for the fundamental and first excited <i>LP</i> modes. Moreover, this study demonstrates that a high confinement of the electromagnetic energy can be reached in the near-field, when illuminated with radially polarized light. Finally, it was verified that the confinement of the field depends on the volume of the probe apex.
Identifiants
Type de publication
journal article
Dossier(s) à télécharger
