Abstract

We experimentally demonstrate and theoretically predict a new and unprecedented optical carpet that includes all the geometric shadow and far-field and near-field diffraction patterns at the transverse plane in the diffraction from a radial grating illuminated by a plane wavefront. The main feature of using radial grating is the continuous change of the spatial period along the radial direction. Therefore, the geometric shadow, and the near-field and far-field diffraction regimes are mixed at various propagation distances, and the traditional definitions for the different diffraction regimes would not apply here. We show that for a given propagation distance, at a certain radial distance the shadow regime changes to the near-field regime and at another certain radial distance, the diffraction pattern changes from a near-field to a far-field case.

© 2017 Optical Society of America

Colorful radial Talbot carpet at the transverse plane

Saifollah Rasouli, SAEED HAMZELOUI, and Davud Hebri
Opt. Express 27(13) 17435-17448 (2019)

Intensity-based measuring of the topological charge alteration by the diffraction of vortex beams from amplitude sinusoidal radial gratings

Davud Hebri, Saifollah Rasouli, and Mohammad Yeganeh
J. Opt. Soc. Am. B 35(4) 724-730 (2018)

Gaussian beam diffraction from radial structures: detailed study on the diffraction from sinusoidal amplitude radial gratings

Razieh Azizkhani, Davud Hebri, and Saifollah Rasouli
Opt. Express 31(13) 20665-20682 (2023)

Power amplification in the core area of radial carpet beams

Saifollah Rasouli and Somaye Fathollazade
J. Opt. Soc. Am. B 41(3) 728-737 (2024)

Theory of diffraction of vortex beams from structured apertures and generation of elegant elliptical vortex Hermite–Gaussian beams

Davud Hebri, Saifollah Rasouli, and Ali Mardan Dezfouli
J. Opt. Soc. Am. A 36(5) 839-852 (2019)