The role of normal polarization in far-field subwavelength imaging by a dielectric microsphere or microcylinder

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Abstract

The role of normal polarization in far-field subwavelength imaging granted by a dielectric microsphere or microcylinder is revealed. Two hypotheses explaining this imaging are suggested. One of these hypotheses is confirmed by exact numerical simulations. It is an efficient excitation of a set of creeping waves at a curved dielectric interface by a normally polarized dipole. After their emission from the microparticle surface these waves create a diffraction-free imaging beam, and subwavelength imaging becomes possible.

Original languageEnglish
Article number075002
Number of pages11
JournalJournal of Optics (United Kingdom)
Volume22
Issue number7
DOIs
Publication statusPublished - Jul 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Imaging
  • photonic nano-jet
  • resolution

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