Stopping of diffraction-free beams by interference collapse

S. Kukhlevsky, G. Nyitray

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The collapse of a finite-width diffraction-free beam (FDFB) under propagation in free space is studied by using relation between the waveguide modes and the free-space modes generated by a Fresnel source of the respective finite-length waveguide. We demonstrate the unusual behaviour of a 2-dimensional FDFB. It is shown that the relatively slow collapse of the amplitude and phase distributions of the FDFB in area outside the central virtual-waveguide region is accompanied by the fast and dramatic decrease of its amplitude in the "waveguide" region, which produces the step-like longitudinal distribution of the intensity. The overall intensity of the FDFB is constant, but redistributed from the central "waveguide" region to outside regions. The dramatic decrease of the intensity in the "waveguide" region, which looks like the immediate "stopping or disappearing" of a beam, is attributed to the strongly destructive interference of the beams generated by the Fresnel zones in the region behind the virtual waveguide. The phenomenon is illustrated by the numerical examples for the light, dark, self-imaging, zigzag and contracting 2-dimensional FDFBs.

Original languageEnglish
Pages (from-to)213-219
Number of pages7
JournalOptics Communications
Volume218
Issue number4-6
DOIs
Publication statusPublished - Apr 1 2003

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Wave interference
stopping
Waveguides
Diffraction
waveguides
interference
diffraction
Imaging techniques
propagation

Keywords

  • Bessel beams
  • Diffraction-free beams
  • Fresnel waveguides

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Stopping of diffraction-free beams by interference collapse. / Kukhlevsky, S.; Nyitray, G.

In: Optics Communications, Vol. 218, No. 4-6, 01.04.2003, p. 213-219.

Research output: Contribution to journalArticle

Kukhlevsky, S. ; Nyitray, G. / Stopping of diffraction-free beams by interference collapse. In: Optics Communications. 2003 ; Vol. 218, No. 4-6. pp. 213-219.
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