Results 31 to 40 of about 441,106 (295)
Spin–Orbital Transformation in a Tight Focus of an Optical Vortex with Circular Polarization
Applied Sciences, 2023 In the framework of the Richards–Wolf formalism, the spin–orbit conversion upon tight focusing of an optical vortex with circular polarization is studied.
Victor V. Kotlyar +4 more
doaj +1 more source
Sticky Brownian Rounding and its Applications to Constraint Satisfaction Problems [PDF]
, 2019 Semidefinite programming is a powerful tool in the design and analysis of approximation algorithms for combinatorial optimization problems. In particular, the random hyperplane rounding method of Goemans and Williamson has been extensively studied for ...
Abbasi-Zadeh, Sepehr +5 more
core +2 more sources
Tight Focusing of Circular Partially Coherent Radially Polarized Circular Airy Vortex Beam
Photonics, 2023 The tight focusing properties of circular partially coherent radially polarized circular Airy vortex beams (CPCRPCAVBs) are theoretically studied in this paper.
Zhihao Wan +10 more
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
Tunneling behavior of Ising and Potts models in the low-temperature regime [PDF]
, 2018 We consider the ferromagnetic $q$-state Potts model with zero external field in a finite volume and assume that the stochastic evolution of this system is described by a Glauber-type dynamics parametrized by the inverse temperature $\beta$.
Nardi, Francesca R., Zocca, Alessandro
core +3 more sources
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
Компьютерная оптика, 2022 Using a finite-difference time-domain method, it has been shown that focal spots generated when tightly focusing a linearly polarized Gaussian beam by a Fresnel zone plate (FZP) and when focusing a Gaussian beam with an embedded optical vortex by a ...
A.A. Savelyeva, E.S. Kozlova
doaj +1 more source
, 2011 Using the tilted-pulse-intensity-front scheme, we generate single-cycle terahertz (THz) pulses by optical rectification of femtosecond laser pulses in LiNbO3.
Blanchard, F. +3 more
core +1 more source
Boron and nitrogen doping in graphene antidot lattices [PDF]
, 2016 Bottom-up fabrication of graphene antidot lattices (GALs) has previously yielded atomically precise structures with sub-nanometer periodicity. Focusing on this type of experimentally realized GAL, we perform density functional theory calculations on the ...
Brun, Søren J. +2 more
core +3 more sources
, 2015 In vectorial diffraction theory, tight focusing of a linearly polarized laser beam produces an anisotropic field distribution around the focal plane.
Choi, Jai-Min, Noh, Heeso
core +1 more source