Optics and Photonics Society of Iran

Diffraction of a plane wave from 2D periodic structures in the polar coordinates including amplitude and phase radial gratings and 2D Bessel-based radial structures has been previously studied. For radial gratings, the diffraction pattern is a radial carpet beam that has an invariant shape under propagation. It was also shown that the 2D Bessel-based radial structures have self-images. In this paper, with theoretical work and simulation, the diffraction of a Gaussian beam from 2D separable structures in the polar coordinates are investigated. It is shown that by optimally selecting the radius of the Gaussian beam waist it is possible to form a petal-like diffraction intensity pattern that is applicable to multiple particle trapping.