In this paper we present a new kind of kinoform lenses in which the phase distribution is
characterized by the “devil's staircase” function. The focusing properties of these fractal …

A zone plate lens utilizing a refractive instead of diffractive approach is presented for
broadband operation. By utilizing transformation optics, we compress the conventional …

We report the achievement of the first images to our knowledge obtained with a fractal zone
plates (FraZPs). FraZPs are diffractive lenses characterized by the fractal structure of their …

In this paper we present a new kind of vortex lenses in which the radial phase distribution is
characterized by the “devil's staircase” function. The focusing properties of these fractal …

Three kinds of high efficiency phase-type fractal zone plates were rapidly (in tens of minutes)
fabricated by femtosecond laser two-photon photopolymerization. Their theoretical maximal …

Fractal zone plates (FZPs), ie, zone plates with fractal structure, have been recently
introduced in optics. These zone plates are distinguished by the fractal focusing structure …

We demonstrate optical manipulation with an optical beam generated by a fractral zone
plate (FZP). The experimental results show that the FZP beam can simultaneously trap …

We demonstrate an optical tweezers using a laser beam on which is imprinted a focusing
phase profile generated by a Devil's staircase fractal structure (Cantor set). We show that a …

Electrically switchable phase-type fractal zone plates and fractal photon sieves were
fabricated using polymer-dispersed liquid crystal material based on a photomask. While …

There is high demand for a tailorable three-dimensional (3D) distribution of focused laser
beams for simultaneous optical manipulation of multiple particles separately distributed in …