In this paper, we investigate the focusing properties of a vortex-cosh-Gaussian (vChG) beam passing through converging thin lens. Based on Huygens–Fresnel diffraction integral, derived analytical propagation equation as well width expression focused vChGB. It is shown that including focal shift vChGB are crucially dependent incident parameters namely decentered parameter and topological charge ...

In this research, two related research topics were investigated. The first one is the use of scalar diffraction theory for the purpose of simulating and implementing diffractive optical elements (DOEs). The main focus was on the optimal design of computer-generated holograms (CGHs). Two existing methods were combined to improve the reconstructed image of a CGH. The new method combines the Optim...

We demonstrate that anisotropy of Fresnel diffraction in a birefringent medium can be quantitatively characterized by planar tensor. Eigenvectors the tensor correspond to directions minimum and maximum beam divergence. Zero eigenvalues exist for fast eigenmode near optic axis biaxial crystals autocollimated propagation. Applications are demonstrated analysis noncritical phase matching acousto-o...

We have developed reflective diffraction optical elements (DOE) for focusing radiation of terahertz free electron lasers (FEL). Metal-dielectric Fresnel zone plates and metallic kinoform “lenses” were fabricated and tested using FEL radiation. A microbolometer camera (see the paper by Esaev et al. at this conference) sensitive to THz radiation had been applied for recording both terahertz beam ...

Current and future capabilities of X-ray spectromicroscopy are discussed based on coherence-limited imaging methods which will benefit from the dramatic increase in brightness expected from a diffraction-limited storage ring (DLSR). The methods discussed include advanced coherent diffraction techniques and nanoprobe-based real-space imaging using Fresnel zone plates or other diffractive optics ...

Holography plays a significant role in applications such as data storage, light trapping, security, and biosensors. However, conventional fabrication methods remain time-consuming, costly, and complex, limiting the fabrication of holograms and their extensive use. Here, we demonstrate a single-pulse laser ablation technique to write parallel surface gratings and Fresnel zone plates. We utilized...

Fresnel zone plates are the key optical elements for nanoscale focusing of X‐ray beams with high spatial resolution. Conventional zone plates manufactured by planar nanotechnology processes are limited by the achievable aspect ratios of their zone structures. Additionally, ultra‐high resolution X‐ray optics with high efficiency require 3‐D shaped tilted z...

Profile transformation of a uniform monochromatic beam with flat wavefront after the propagation through an apodizer comprising square serrated aperture and spatial filter is theoretically considered at exit behind it. Main differences from case circular geometry are shown. Roles angles, phase in Fresnel diffraction, shape serrations serration height-to-period ratio analyzed.