MacDonald, M.P., Prentice, P. and Dholakia, K. (2006) Optical vortices produced by diffraction from dislocations in two-dimensional colloidal crystals. New Journal of Physics, 8(10), p. 257. (doi: 10.1088/1367-2630/8/10/257)
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Abstract
A dislocation in a crystal can be described by a Burger's vector b, whilst a screw dislocation in a laser mode can be described by a topological charge l. By illuminating both optically trapped and self-assembled two-dimensional (2D) colloidal crystals with a Gaussian laser beam, we show a correspondence between crystal and optical dislocations, where the first order diffraction pattern from a crystal with Burgers' vector b = na consists of vortex laser modes of topological charge l = ±mn, (n = integer, a = lattice constant and m = diffraction order).
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Prentice, Dr Paul |
| Authors: | MacDonald, M.P., Prentice, P., and Dholakia, K. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | New Journal of Physics |
| Publisher: | Institute of Physics Publishing Ltd. |
| ISSN: | 1367-2630 |
| ISSN (Online): | 1367-2630 |
| Published Online: | 26 October 2006 |
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