Optical Force Effects of Rayleigh Particles by Cylindrical Vector Beams [PDF]
NanomaterialsHigh-order cylindrical vector beams possess flexible spatial polarization and exhibit new effects and phenomena that can expand the functionality and enhance the capability of optical systems.
Yuting Zhao +4 more
doaj +3 more sources
Measuring of Transverse Energy Flows in a Focus of an Aluminum Lens
Photonics, 2022 In this study, we theoretically and experimentally investigate the propagation of a second-order cylindrical vector beam through an aluminum lens which forms a tight focus at the distance of the wavelength. Simulation by the finite-difference time-domain
Elena Kozlova +5 more
doaj +2 more sources
Polarization Strips in the Focus of a Generalized Poincaré Beam
PhotonicsWe analyze the tight focusing of a generalized Poincaré beam using a Richards–Wolf formalism. Conventional Poincaré beams are superpositions of two Laguerre–Gaussian beams with orthogonal polarization, while the generalized Poincaré beams are composed of
E S Kozlova +2 more
exaly +3 more sources
Energy backflow in a focal spot of the cylindrical vector beam [PDF]
Компьютерная оптика, 2018 Using Richards-Wolf formulae it is shown that a tightly focused azimuthally-radially polarized m-th order laser beam with an arbitrary apodization function produces a reverse energy flow in the focal plane (m=2).
Sergey Stafeev +2 more
doaj +1 more source
Vortex energy flow in the tight focus of a non-vortex field with circular polarization [PDF]
Компьютерная оптика, 2020 Using Richards-Wolf formulas, we show that an axisymmetric circularly polarized vortex-free field can be focused into a sharp subwavelength focal spot, around which there is a region where the light energy flow propagates along a spiral. This effect can
Victor Kotlyar +2 more
doaj +1 more source
Longitudinal component of the Poynting vector of a tightly focused optical vortex with circular polarization [PDF]
Компьютерная оптика, 2018 We numerically investigated the focusing of optical vortices with the wavelength λ = 532 nm and right-hand circular polarization by using a diffractive lens with the numerical aperture NA = 0.95.
Sergey Stafeev, Anton Nalimov
doaj +1 more source
The near-axis backflow of energy in a tightly focused optical vortex with circular polarization [PDF]
Компьютерная оптика, 2018 Using the Richards-Wolf formulae for a diffractive lens, we show that in the focal plane of a sharply focused left-hand circularly polarized optical vortex with the topological charge 2 there is an on-axis backflow of energy (as testified by the negative
Victor Kotlyar +2 more
doaj +1 more source
Formation of an elongated region of energy backflow using ring apertures [PDF]
Компьютерная оптика, 2019 In this paper, we have investigated the focusing of a second-order cylindrical vector beam by using a high numerical aperture (NA) lens limited by a ring aperture using the Richards-Wolf formulae.
Sergey Stafeev, Victor Kotlyar
doaj +1 more source
Toroidal polarization vortices in tightly focused beams with singularity
Компьютерная оптика, 2020 In this paper, we numerically investigated tight focusing of cylindrical vector beams of the sec-ond order using Richards-Wolf formulae. It was shown that intensity rings where the Poynting vector was equal to zero appeared not only in the focal plane ...
S.S. Stafeev, V.V. Kotlyar
doaj +1 more source
Formation of the reverse flow of energy in a sharp focus [PDF]
Компьютерная оптика, 2019 It was theoretically shown that in the interference pattern of four plane waves with specially selected directions of linear polarization it is formed a reverse flow of energy.
Victor Kotlyar +3 more
doaj +1 more source