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Study on the Material Removal Mechanism of FGH99 by Laser-Induced Microjet Assisted Ablation at Different Incidence Angles. [PDF]
Micromachines (Basel)Duan Y, Zhang Z, Zhu Z, Ni J.
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The Impact of Displacement Patterns on CO<sub>2</sub> Storage in Saline Aquifers Based on Two Real Core Micromodels. [PDF]
ACS OmegaZhao C, Li Q, Zhou S, Song Y, Zhang Y.
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Optical Technologies for Telecommunications 2020, 2021
Using electronic beam lithography and ion etching we manufactured a metalens with diameter 30 μm, focal length 633 nm and relief depth of 130 nm. The metalens consists from 16 sector subwavelength binary gratings with period 220 nm. The proposed metalens generates a left-hand circularly polarized optical vortex with topological charge 2 when it is ...
Sergey Stafeev +2 more
exaly +2 more sources
Using electronic beam lithography and ion etching we manufactured a metalens with diameter 30 μm, focal length 633 nm and relief depth of 130 nm. The metalens consists from 16 sector subwavelength binary gratings with period 220 nm. The proposed metalens generates a left-hand circularly polarized optical vortex with topological charge 2 when it is ...
Sergey Stafeev +2 more
exaly +2 more sources
Elongation of the area of energy backflow through the use of ring apertures
Optics Communications, 2019Abstract Using the Richards–Wolf formula, we investigate the tight focusing of a cylindrical vector beam of second order using a high-numerical aperture lens confined by a ring aperture. It is shown that the area of energy backflow can be enlarged by the ring aperture, and that focusing light using a lens with a numerical aperture of 0.95 and a ring ...
V V Kotlyar, S S Stafeev
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Quantum backflow, negative kinetic energy, and optical retro-propagation
Journal of Physics A: Mathematical and Theoretical, 2010For wavefunctions whose fourier spectrum (wavenumber or frequency) is positive, the local phase gradient can sometimes be negative; examples of this 'backflow' occur in quantum mechanics and optics. The backflow probability P (fraction of the region that is backflowing) is calculated for several cases.
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Energy backflow in the focus of a light beam with phase or polarization singularity
Physical Review A, 2019Sergey Stafeev +2 more
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Journal of Optics, 2019
Abstract Using the plane waves expansion, we derive all six components of the E- and H-vectors for an elliptically polarized optical vortex with the arbitrary topological charge. Relations to describe the distributions of intensity and components of the Poynting vector in the initial plane of the optical vortex are also derived.
Victor V Kotlyar, Alexey A Kovalev
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Abstract Using the plane waves expansion, we derive all six components of the E- and H-vectors for an elliptically polarized optical vortex with the arbitrary topological charge. Relations to describe the distributions of intensity and components of the Poynting vector in the initial plane of the optical vortex are also derived.
Victor V Kotlyar, Alexey A Kovalev
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Energy Backflow in Tightly Focused Optical Vortex
2018 20th International Conference on Transparent Optical Networks (ICTON), 2018We numerically investigated the focusing of optical vortices with topological charge of 2, wavelength of 532 nm and circular polarization by a diffractive lens with a numerical aperture NA = 0.95. The simulation was carried out using the Richards-Wolf formulae and FDTD-method.
Sergey S. Stafeev +2 more
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