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Articles by Alexey Porfirev
Interference Generation of a Reverse Energy Flow with Varying Orbital and Spin Angular Momentum Density
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Photonics | Free Full-Text | Analysis of the Polarization Distribution and Spin Angular Momentum of the Interference Field Obtained by Co-Planar Beams with Linear and Circular Polarization
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Structured polarized laser beams for controlled spiral-shaped mass transfer in azopolymer thin films
We present an approach for the realization of controlled spiral-shaped mass transfer in azopolymer thin films and the fabrication of spiral microreliefs. For such laser processing, we propose to use light fields with structured polarization distributions generated by a transmissive spatial light modulator. The projection lithography approach is utilized, transferring the pattern directly to the surface of azopolymer thin films.
Stacked Polarizing Elements for Controlling Parameters of Surface Relief Gratings Written in Photosensitive Materials
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Generation of Light Fields with Controlled Non-Uniform Elliptical Polarization When Focusing on Structured Laser Beams
Open AccessArticle by 1,2, 1 and 1,2,* 1 Image Processing Systems Institute of RAS—Branch of the FSRC “Crystallography and Photonics” RAS, Samara 443001, Russia 2 Scientific Research Laboratory of automated systems of scientific research (SRL-35), Samara National Research University, Samara 443086, Russia * Author to whom correspondence should be addressed.
Simple Method of Light Field Calculation for Shaping of 3D Light Curves
Open AccessArticle by 1,2, 1,2, 2, 2 and 1,2,* 1 Scientific Research Laboratory of Automated Systems of Scientific Research, Samara National Research University, Samara 443086, Russia 2 Image Processing Systems Institute of RAS—Branch of the FSRC “Crystallography and Photonics” RAS, Samara 443001, Russia * Author to whom correspondence should be addressed.
Composite Diffraction-Free Beam Formation Based on Iteratively Calculated Primitives
This is an early access version, the complete PDF, HTML, and XML versions will be available soon. Open AccessArticle by 1,2, 1,2 and 1,2,* 1 Samara National Research University, Samara 443086, Russia 2 Image Processing Systems Institute of RAS—Branch of the FSRC “Crystallography and Photonics” RAS, Samara 443001, Russia * Author to whom correspondence should be addressed.
Multi-Spiral Laser Patterning of Azopolymer Thin Films for Generation of Orbital Angular Momentum Light
Abstract : Recently, the realization of the spiral mass transfer of matter has attracted the attention of many researchers. Nano- and microstructures fabricated with such mass transfer can be used for the generation of light with non-zero orbital angular momentum (OAM) or the sensing of chiral molecules. In the case of metals and semiconductors, the chirality of formed spiral-shaped microstructures depends on the topological charge (TC) of the illuminating optical vortex (OV) beam.
Polarization-Sensitive Patterning of Azopolymer Thin Films Using Multiple Structured Laser Beams
This is an early access version, the complete PDF, HTML, and XML versions will be available soon. Open AccessArticle by Alexey P. Porfirev , Svetlana N. Khonina , Nikolay A. Ivliev , Sergey A. Fomchenkov , Denis P. Porfirev and Sergey V. Karpeev * Image Processing Systems Institute of RAS—Branch of the FSRC “Crystallography and Photonics” RAS, 443001 Samara, Russia * Author to whom correspondence should be addressed.
Diatom optical element: a quantized version of the generalized spiral lens
Abstract Here we introduce a diatom optical element—a special case of the generalized spiral lens widely used for generation of light fields with orbital angular momentum. The profile of such an element is visually similar to the structure of a diatom. In contrast to currently existing special cases (axicon, parabolic lens, or autofocusing optical element) of a generalized spiral lens, diatom optical elements shape light fields with an intensity distribution that is neither a spiral nor a ring.
Two-step maskless fabrication of compound fork-shaped gratings in nanomultilayer structures based on chalcogenide glasses
Abstract We demonstrate an easy two-step maskless method for the fabrication of so-called compound fork-shaped gratings in nanomultilayer structures (NMLSs) based on chalcogenide glasses. Such elements allow one to generate different configurations of optical vortex (OV) beams with given topological charges (TCs). The used NMLS is particularly interesting because it enables one to realize the direct one-step writing of the surface relief without selective etching.
Laser manipulation of airborne microparticles behind non-transparent obstacles with the help of circular Airy beams
Abstract An approach for the realization of three-dimensional laser manipulation of agglomerations of carbon nanoparticles behind non-transparent obstacles in the air is proposed and investigated. The approach is based on the use of circular Airy beams (CABs), which are structured laser beams with self-healing and autofocusing properties.
Vector Lissajous laser beams
Abstract We consider a new type of vector beam, the vector Lissajous beams (VLB), which is of double order $(p,q)$ and a generalization of cylindrical vector beams characterized by single-order $p$. The transverse components of VLBs have an angular relationship corresponding to Lissajous curves.
Demonstration of a simple technique for controllable revolution of light-absorbing particles in air
Abstract The rotation of optically trapped particles is used in many applications for the realization of different micromechanical devices, such as micropumps, microrotors, and microgyroscopes, as well as for the investigation of particle interactions. Although for transparent micro-objects in both liquid media and vacuum, the rotation can easily be realized by transfer of the spin angular or orbital angular momentum from the light to the object.
Orbital angular momentum of a laser beam behind an off-axis spiral phase plate
Abstract Here we obtain a simple formula for the relative total orbital angular momentum (OAM) of a paraxial light beam with arbitrary rotationally symmetric complex amplitude, passed through an off-axis spiral phase plate (SPP). The formula shows that the OAM is zero if the incident light is bounded by a diaphragm, and the SPP center is outside it.
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