Colloidal holography and crystal dislocations

Michael P. MacDonald, Paul Prentice, Kishan Dholakia

Research output: Contribution to journalConference article

Abstract

The analogous nature of dislocations in crystals and light leads to some interesting links between the properties of optical and crystal dislocations 1. A dislocation in a crystal can be described by a Burgers vector b, whilst a dislocation in a laser mode such as the vortex in a Laguerre Gaussian beam, can be described by a topological charge l 2. By illuminating both optically trapped and self-assembled two-dimensional colloidal crystals with a Gaussian laser beam, we show a direct link between crystal and light dislocations, where the first order diffraction pattern from a crystal with Burgers' vector b = na contains vortex laser modes of topological charge l = ±mn, (where n is an integer, a is the lattice constant of the crystal and m is an integer corresponding to the diffraction order).

Original languageEnglish
Article number593017
Pages (from-to)1-11
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5930
DOIs
Publication statusPublished - 1 Dec 2005
EventOptical Trapping and Optical Micromanipulation II - San Diego, CA, United States
Duration: 31 Jul 20054 Aug 2005

Fingerprint

crystal dislocations
Holography
Dislocation
Dislocations (crystals)
holography
Crystal
Crystals
crystals
laser modes
Burgers vector
integers
Gaussian Beam
Laser modes
Telecommunication links
vortices
Vortex flow
Diffraction
Vortex
Charge
Laser

Keywords

  • Colloid
  • Crystal Dislocations
  • Diffraction
  • Optical Trapping
  • Optical Vortices

Cite this

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Colloidal holography and crystal dislocations. / MacDonald, Michael P.; Prentice, Paul; Dholakia, Kishan.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 5930, 593017, 01.12.2005, p. 1-11.

Research output: Contribution to journalConference article

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