Evolution of an optical vortex dipole diffracted by a half screen | Zendy

Zenghui Gao | Zendy; De He | Zendy; Lü Bai-Da | Zendy

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Evolution of an optical vortex dipole diffracted by a half screen

Author(s) -

Zenghui Gao,

De He,

Lü Bai-Da

Publication year - 2011

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.60.074209

Subject(s) - diffraction , dipole , physics , annihilation , optics , optical vortex , vortex , time evolution , displacement (psychology) , beam (structure) , gaussian , quantum mechanics , psychology , psychotherapist , thermodynamics

The analytical expression for the propagation of an optical vortex dipole (OVD) nested in a Gaussian beam diffracted by a half screen is derived and used to study the evolution of the diffracted OVD. It is shown that Compared with the case of the OVD evolution in free space, multi-pairs of the OVD may take place in the diffracted field, and the annihilation fashion depends on the off-axis displacement. A variety of the evolution behaviors of OVDs appear by varying the off-axis parameter, but the topological charge is conserved in the evolution process.

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