title: Focusing of an elliptic vortex beam by a square Fresnel zone plate.
abstract: We propose a new (to our knowledge) method for performing beam shaping. Calculations show that beam patterns including diamond, rhombus, and hollow beam with diamond-shaped dark core can be generated in the focal plane of a square Fresnel zone plate by choosing appropriate parameters of an incident elliptic vortex beam. Numerical simulations have demonstrated the validity and effectiveness of this method.
authors: Department of Physics, Zhejiang University, Hangzhou, China.
authors: Ziyang
authors: Z
authors: Chen
authors: Daomu
authors: D
authors: Zhao