Abstract

We report here the generation of a three-dimensional (3D) dark focus from a single focused monochromatic Gaussian beam that undergoes conical refraction when it propagates along one of the optic axes of a biaxial crystal. We study the resulting ring intensity pattern behind the crystal as a function of the ratio between the ring radius and the beam waist and derive the particular parameter values for which a 3D dark focus with null intensity at the ring center is formed. We have performed experiments with a KGd(WO4)2 biaxial crystal, reporting the generation of a bottle beam in full agreement with our theoretical investigations.

Authors
Yu. V. Loiko, J. Mompart, E. U. Rafailov, T. K. Kalkandjiev, i A. Turpin
Citation Key
Loiko:13
COinS Data

Date Published
2015-04-10 10:52
DOI
10.1364/OL.38.004648
ISSN
0146-9592
Keywords
Birefringence, Laser cooling, Laser materials processing, Laser trapping
Issue
22
Pagination
4648–4651
Publisher
OSA
Reprint Edition
http://arxiv.org/abs/1409.1853
Journal
Optics Letters
Start Page
4648
URL
http://ol.osa.org/abstract.cfm?URI=ol-38-22-4648
Volume
38
Year of Publication
2013