In recent decades, significant progress has been made in the field of laser beam shaping,
driven by the growing demands in both scientific research and industrial applications …

The art of light engineering unveils a world of possibilities through the meticulous
manipulation of photonic properties such as intensity, phase, and polarization. Precision …

We propose a method for creating parallel Bessel-like vortical optical needles with an
arbitrary axial intensity distribution via the superposition of different cone-angle Bessel …

Bessel beams are of great interest because of their unique diffraction-free properties and
broad potential applications. In this paper we investigate the generation of diffraction-free …

In this work we demonstrate a tunable liquid–crystal element of linear phase profile along
the radial coordinate. In combination with a regular refractive axicon, it behaves as an …

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 …

Optical Bessel beams are used in numerous applications like fluorescence microscopy,
material processing and optical trapping. These applications require Bessel beams having a …

Femtosecond laser processing of dielectric has been widely studied. Nevertheless, a direct
theoretical model for Bessel beam on α-quartz is still essential. The purpose of this study is …

Bessel beams, as one type of special light field, would significantly do benefit to several
applications such as light-sheet microscopy, particle manipulation and free-space optical …

We numerically demonstrate that the tight focusing of Bessel beams can generate focal
fields with an ultra-long depth of focus (DOF). The ultra-long focal field can be controlled by …