Open AccessFocusing properties of Fresnel zone plates with spiral phase
Author(s) -
Binzhi Zhang,
Daomu Zhao
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.012818
Subject(s) - zone plate , fresnel zone , optics , fresnel number , spiral (railway) , fresnel diffraction , phase (matter) , optical vortex , fresnel zone antenna , topological quantum number , physics , fresnel equations , fresnel integral , trapping , refractive index , diffraction , beam (structure) , mathematics , telecommunications , computer science , mathematical analysis , smart antenna , quantum mechanics , dipole antenna , antenna (radio) , ecology , biology
Focusing properties of Fresnel zone plates with spiral phase with integer and fractional topological charges illuminated by plane wave are studied. Numerical results show that hollow beams can be generated and can also be controlled by the number of the zones and the topological charge, which implies the potential applications of such kind of zone plate in trapping and manipulating particles.