Electromagnetic theory of reflaxicon fields

Jari Turunen, Ari T. Friberg

Research output: Contribution to journalArticle

Abstract

The electromagnetic field generated by a right-angle reflective axicon (reflaxicon) is evaluated, in the neighbourhood of the optical axis (the focal line), assuming coherent plane-wave illumination. For a linearly polarized incident wave, the distributions of the electric and the magnetic energy density are found to be rotationally non-symmetric, whereas the total electromagnetic energy density is symmetric. Rotationally symmetric distributions of the electric and magnetic energy densities are obtained with a circularly polarized incident plane wave. The reflaxicon field is also shown to be a striking example of the failure of the pointwise interpretation of the time-averaged Poynting vector as a measure of energy flow: is shown to point in the direction of the optical axis, although the wavevectors of all plane wave components of the reflaxicon field are perpendicular to this axis.

Original languageEnglish
Pages (from-to)539-547
Number of pages9
JournalPure and Applied Optics: Journal of the European Optical Society Part A
Volume2
Issue number5
DOIs
Publication statusPublished - Sep 1993

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