This paper presents an analytical model of the optical vortex scanning microscope. In this
microscope the Gaussian beam with an embedded optical vortex is focused into the sample …

The internal scanning method is specific for the optical vortex microscope. It allows to move
the vortex point inside the focused vortex beam with nanometer resolution while the whole …

In the optical vortex microscopy the focused Gaussian beam with optical vortex scans a
sample. An optical vortex can be introduced into a laser beam with the use of a special …

We consider an optical system that consists of a vortex lens and a microscopic objective.
The system is illuminated with a He–Ne laser. In our previous work we showed that moving …

The analytical solution for the propagation of the laser beam with optical vortex through the
system of lenses is presented. The optical vortex is introduced into the laser beam …

Many vortex-generation techniques have been developed to address a range of potential
applications, exploiting their unique amplitude and phase profiles and their possession of …

We study the system of phase singularities ('singular skeleton') formed when a quasi-plane
wave (QPW) input beam diffracts at a double-phase-ramp (DPR) converter. The external (OV …

We analyze transformations of circular Laguerre–Gaussian beams with zero radial index
after passage through the double-phase-ramp (DPR) converter and study the behavior of …

A full theoretical and experimental analysis of the chain of phase singularities generated
when a Gaussian beam passes a double-phase-ramp converter is presented. The overall …

Optical vortices can be used in scanning microscopy. A sample can be scanned just by
moving a vortex lens, introducing an optical vortex into a Gaussian beam. This technique …