Results 11 to 20 of about 68,903 (215)
High repetition rate green-pumped supercontinuum generation in calcium fluoride
Scientific Reports, 2021 We compare supercontinuum generation in $$\hbox {CaF}_2$$ CaF 2 crystal under tight and loose focusing of 150 fs, 515 nm second harmonic pulses from an amplified Yb:KGW laser at a repetition rate of 10 kHz.
Vaida Marčiulionytė +3 more
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Inverse Energy Flux in Tight Focusing of Vector Vortex Beam
Photonics, 2023 In this paper, we focus on the study of the negative energy flow in the tight focusing of a radially polarized vortex beam. We know that, because of the coupling of the polarization state and the vortex charge, the on-axis energy flow in the focal region
Ruixiang Chen +4 more
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Tailoring of Inverse Energy Flow Profiles with Vector Lissajous Beams
Photonics, 2022 In recent years, structured laser beams for shaping inverse energy flow regions: regions with a direction of energy flow opposite to the propagation direction of a laser beam, have been actively studied.
Svetlana N. Khonina +4 more
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Photonics, 2023 In this paper, partially coherent radially polarized (RP) Laguerre-Gaussian (LG) rotationally symmetrical power-exponent phase vortex (RSPEPV) beams with the LG-correlated Schell-model (LGSM) were introduced.
Zhiyuan Ma +5 more
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Sensors, 2021 We discuss interesting effects that occur when strongly focusing light with mth-order cylindrical–circular polarization. This type of hybrid polarization combines properties of the mth-order cylindrical polarization and circular polarization.
Victor V. Kotlyar +3 more
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Toroidal Vortices of Energy in Tightly Focused Second-Order Cylindrical Vector Beams
Photonics, 2021 In this paper, we simulate the focusing of a cylindrical vector beam (CVB) of second order, using the Richards–Wolf formula. Many papers have been published on focusing CVB, but they did not report on forming of the toroidal vortices of energy (TVE) near
Sergey S. Stafeev +2 more
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Photonics, 2022 In this paper, using the Richards–Wolf equations, the focusing of circularly polarized light with flat diffractive lenses is considered. It is shown that, as the numerical aperture (NA) of the lens increases, the size of the focal spot first decreases ...
Sergey S. Stafeev +2 more
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Experimental investigation of the energy backflow in the tight focal spot
Компьютерная оптика, 2020 Using two identical microobjectives with a numerical aperture NA = 0.95, we experimentally demonstrate that the on-axis intensity near the tight focal spot of an optical vortex with a topological charge 2 is zero for right-handed circular polarization ...
V.V. Kotlyar +4 more
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Vector Beams with Only Transverse Intensity at Focus
Applied Sciences, 2023 In this work, the tight focusing of vector beams with azimuthal polarization and beams with a V-line of polarization singularity (sector azimuthal polarization) was simulated numerically using the Richards–Wolf formulas.
Sergey S. Stafeev +4 more
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Tight Focusing of Partially Coherent Vortex Beams
International Journal of Optics, 2012 Tight focusing of partially polarized vortex beams has been studied. Compact form of the coherence matrix has been derived for polarized vortex beams.
Rakesh Kumar Singh
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