Topological charge and angular momentum of light beams carrying optical vortices

Soskin, M. S., Gorshkov, V. N., Vasnetsov, M. V., Malos, J. T. and Heckenberg, N. R. (1997) Topological charge and angular momentum of light beams carrying optical vortices. Physical Review A, 56 4: 4064-4075. doi:10.1103/PhysRevA.56.4064

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Author Soskin, M. S.
Gorshkov, V. N.
Vasnetsov, M. V.
Malos, J. T.
Heckenberg, N. R.
Title Topological charge and angular momentum of light beams carrying optical vortices
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 1997-10-01
Sub-type Article (original research)
DOI 10.1103/PhysRevA.56.4064
Open Access Status File (Publisher version)
Volume 56
Issue 4
Start page 4064
End page 4075
Total pages 12
Place of publication New York
Publisher American Physical Society
Language eng
Subject 02 Physical Sciences
Abstract We analyze the properties of light beams carrying phase singularities, or optical vortices. The transformations of topological charge during free-space propagation of a light wave, which is a combination of a Gaussian beam and a multiple charged optical vortex within a Gaussian envelope, are studied both in theory and experiment. We revise the existing knowledge about topological charge conservation, and demonstrate possible scenarios where additional vortices appear or annihilate during free propagation of such a combined beam. Coaxial interference of optical vortices is also analyzed, and the general rule for angular-momentum density distribution in a combined beam is established. We show that, in spite of any variation in the number of vortices in a combined beam, the total angular momentum is constant during the propagation. [S1050-2947(97)09910-1].
Keyword Optics
Physics, Atomic, Molecular & Chemical
Wave-front Dislocations
Phase Singularities
Screw Dislocations
Laser-beams
Propagation
Resonator
Solitons
Modes
Media
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
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Created: Mon, 13 Aug 2007, 17:02:13 EST