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Tight focusing of a quasi-cylindrical optical vortex
Optics Communications, 2017Abstract In this article, we numerically investigate the tight focusing of a quasi-cylindrical optical vortex with azimuthal polarization and a wavelength of 532 nm using a Fresnel zone plate with a numerical aperture of NA = 0.95. It is shown that the focal spot produced by a beam with six sectors does not differ from the ideally azimuthally ...
Sergey S Stafeev, VÍCTOR V Kotlyar
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Tight focusing of orthogonal C-point polarization states
Optik, 2023Sushanta Kumar Pal
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Vectorial Spin Hall Effect of Light upon Tight Focusing
2023 Photonics North (PN), 2022The spin Hall effect of light is a manifestation of angular momentum conservation in the process of spin–orbit interaction of light. This optical Hall effect is exhibited in tight focusing of a circularly polarized asymmetric input beam as a shift of the center of gravity of the focal spot in the transverse plane, perpendicular to the direction/axis of
Svetlana N. Khonina, Ilya Golub
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Tight focusing of radially polarized beams modulated by a fractal conical lens [PDF]
Optics Communications, 2017 A novel high numerical aperture (NA) focusing system with a fractal conical lens (FCL) is proposed, and tight focusing of radially polarized beams through the proposed optical system is investigated theoretically and numerically. The influence of several
Zhirong Liu, Kelin Huang
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Tight focusing of elliptically polarized vortex beams
Applied Optics, 2009We study the focusing properties of elliptically polarized vortex beams. Based on vectorial Debye theory, some numerical calculations are given to illustrate the intensity and phase distribution properties of tightly focused vortex beams. It is found that the spin angular momentum of the elliptically polarized vortex beam will convert to orbital ...
Baosuan, Chen, Jixiong, Pu
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Tight focusing of quasi-cylindrically polarized beams
Journal of the Optical Society of America A, 2014Based on vectorial diffraction theory, tight focusing properties of quasi-cylindrical polarized beams (QCPBs) composed of equal fan-shaped sectors with linear polarization are investigated. We find that, for quasi-radially polarized illumination, a weak azimuthal component emerges and the circular symmetry of focus is traded in when the total number of
Zhongsheng, Man +3 more
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Tight focusing of vortex beams in presence of primary astigmatism
Journal of the Optical Society of America A, 2009The tight focusing of vortex carrying beams is studied using the Debye-Wolf diffraction integral in the presence of primary astigmatism. The roles of topological charge, polarization distribution of the input beam, and handedness of the beam polarization are investigated in the intensity distribution of the focal plane of a high-numerical-aperture lens.
Rakesh Kumar, Singh +2 more
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Tight focusing properties of hybridly polarized vector beams
Journal of the Optical Society of America A, 2012We theoretically investigate the tight focusing properties of hybridly polarized vector beams. Some numerical results are obtained to illustrate the intensity, phase, and polarization of tightly focused hybridly polarized vector beams. It is shown that the shape of the focal pattern may change from an elliptical beam to a ring focus with increasing ...
Kelei, Hu, Ziyang, Chen, Jixiong, Pu
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Focused Fracture Jetting for Tight Carbonate Reservoirs
SPE International Hydraulic Fracturing Technology Conference and Exhibition, 2023Abstract This paper provides an overview of the trial implementation of Focused fracture jetting, a solution aimed at effectively stimulating long horizontal open-hole wells in the oil and gas industry. The goal of this method is to create multiple fractures that penetrate deeper into the reservoir, increasing the overall stimulated ...
Sataa. Al-Rahbi +3 more
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Tight focusing of electromagnetic fields by large-aperture mirrors
Physical Review E, 2019We derive nonparaxial input conditions for simulations of tightly focused electromagnetic fields by means of unidirectional nonparaxial vectorial propagation equations. The derivation is based on the geometrical optics transfer of the incident electric field from significantly curved reflecting surfaces such as parabolic and conical mirrors to the ...
D. E. Shipilo +6 more
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