Composite polarization singularities in superimposed Laguerre-Gaussian beams beyond the paraxial approximation.
J Opt Soc Am A Opt Image Sci Vis
; 27(3): 578-84, 2010 Mar 01.
Article
em En
| MEDLINE
| ID: mdl-20208950
ABSTRACT
The closed-form expression for the free-space propagation of superimposed Laguerre-Gaussian beams beyond the paraxial approximation is derived, and the composite polarization singularities formed by the transverse and longitudinal electric-field components are studied in detail. It is shown that there exist composite C-points and L-lines in vector nonparaxial fields. By suitably varying a control parameter, such as the off-axis distance, relative phase, or amplitude ratio, the motion, creation, and annihilation of composite C-points may appear, and in the process the sum of topological charge remains unchanged. The shift, deformation, combination, and disappearance of composite L-lines may take place. The topological relationship holds true. The results are compared with the previous work.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Refratometria
/
Algoritmos
/
Interpretação de Imagem Assistida por Computador
/
Modelos Estatísticos
Tipo de estudo:
Risk_factors_studies
Idioma:
En
Revista:
J Opt Soc Am A Opt Image Sci Vis
Assunto da revista:
OFTALMOLOGIA
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
China