Anton Nalimov's Books

Sharp Focusing of Laser Light

By: Victor V. Kotlyar,Sergey S. Stafeev,Anton Nalimov

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Sharp Focusing of Laser Light

By: Victor V. Kotlyar,Sergey S. Stafeev,Anton Nalimov

Readers will learn in which ways light can be "confined" within a subwavelength region smaller than half a wavelength. Strictly within the focal spot, all degrees of freedom of light interact and manifest themselves in a dramatic way. The size and shape of the focal spot and the magnitude of side-lobes depend on the polarization state alongside phase and amplitude distributions of a light beam. Readers will learn techniques in which inhomogeneously (i.e., azimuthally and radially) polarized optical beams can be focused. In sharp focus, exotic phenomena can occur, including the negative propagation of light and a toroidal optical flow. Throughout the book, the numerical simulation is performed using the rigorous solution of Maxwell’s equations based on a Finite-Difference Time-Domain (FDTD) approach, which makes the results of modeling highly reliable. The photonic components, including optical metasurfaces, discussed in the book have been implemented using state-of-the-art techniques of electron beam writing and reactive ion-beam etching of microrelief. Two chapters are concerned with photonics hot spots, which deal with the control of light by means of optical metasurfaces and the generation of an energy backflow in the region of sharp focus of a laser beam. Another hot topic is diffractive polarization converters implemented as subwavelength diffraction gratings to convert polarization of light. By way of illustration, such converters are shown to perform linear-to-radial or linear-to-azimuthal polarization conversion. The book describes advanced photonic components fabricated by the authors to perform sharp focusing of light, including binary zone plates, binary axicons, a planar photonic crystal lens, diffraction polarization converters, and metalenses. This book is a must-have for individuals and institutions studying cutting edge optics.

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Page Count

285

Publisher

CRC Press

Published Date

ISBN 10

1000711633

ISBN 13

9781000711639

Topological Charge of Optical Vortices

By: Victor V. Kotlyar,Alexey A. Kovalev,Anton G. Nalimov

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Topological Charge of Optical Vortices

By: Victor V. Kotlyar,Alexey A. Kovalev,Anton G. Nalimov

This book is devoted to the consideration of unusual laser beams – vortex or singular beams. It contains many numerical examples, which clearly show how the phase of optical vortices changes during propagation in free space, and that the topological charge is preserved. Topological Charge of Optical Vortices shows that the topological charge of an optical vortex is equal to the number of screw dislocations or the number of phase singularities in the beam cross-section. A single approach is used for the entire book: based on M. Berry’s formula. It is shown that phase singularities during beam propagation can be displaced to infinity at a speed greater than the speed of light. The uniqueness of the book is that the calculation of the topological charge for scalar light fields is extended to vector fields and is used to calculate the Poincare–Hopf singularity index for vector fields with inhomogeneous linear polarization with V-points and for the singularity index of vector fields with inhomogeneous elliptical polarization with C-points and C- lines. The book is written for opticians, and graduate students interested in an interesting section of optics – singular optics. It will also be of interest to scientists and researchers who are interested in modern optics. In order to understand the content of the book, it is enough to know paraxial optics (Fourier optics) and be able to calculate integrals.

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Page Count

321

Publisher

CRC Press

Published Date

ISBN 10

1000788393

ISBN 13

9781000788396

Internal Friction of Materials

By: Anton Puškár

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Internal Friction of Materials

By: Anton Puškár

Annotation ContentsPossibilities of utilising internal friction measurementsNature and mechanisms of an elasticityEffects on an elasticity of materialsMeasurements of internal friction and defect of elasticity modulusStructural instability of alloysCyclic microplasticity.

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