Fractal zone plates (FZPs), i.e., zone plates with a fractal structure, are described. The focusing properties of this new type of zone plate are compared with those of conventional Fresnel zone plates. It is shown that the axial irradiance exhibited by the FZP has self-similarity properties that can be correlated to those of the diffracting aperture.
© 2003 Optical Society of America
Genaro Saavedra, Walter D. Furlan, and Juan A. Monsoriu, "Fractal zone plates," Opt. Lett. 28, 971-973 (2003)