Abstract Within optics, the Pancharatnam–Berry phase enables the design and creation of
various flat special optical elements such as top-hat converters. We present a study on …

Beam profile engineering, where a desired optical intensity distribution is generated by
phase shifting and/or amplitude changing elements, is a promising approach in various …

Spiral phase elements with topological charges based on space-variant Pancharatnam–
Berry phase optical elements are presented. Such elements can be achieved by use of …

Beams exhibiting long focal lines and small focal spot sizes are desired in a variety of
applications and are called optical needles, with Bessel beams being a common example …

Long focal lines with transverse spot sizes as small as a few wavelengths are called optical
needles. A zeroth order Bessel beam being a good example is widely used in such …

A flat-top beam (or top-hat beam) is a light beam (often a transformed laser beam) having an
intensity profile which is flat over most of the covered area. This is in contrast to Gaussian …

We report the realization of a Pancharatnam-Berry phase optical element [Z. Bomzon, G.
Biener, V. Kleiner, and E. Hasman, Opt. Lett. 27, 1141 (2002)], for wave front shaping …

In this paper, we have performed experimental, analytical, and numerical studies of beams
with topological charges of±1 and±2 formed by silicon binary phase axicons (BPAs) with …

We propose an optical element: a phase-shifted Fresnel axicon for generation of multiple
Bessel beams. By giving a binary phase modulation to the standard Fresnel axicon, the …

We present a method to shape the intensity distribution of an intense laser beam in the focal
region, by means of a bimorph adaptive mirror. We emphasize the advantages in terms of …