Results 11 to 20 of about 441,106 (295)
Comparison of focusing of short pulses in the Debye approximation [PDF]
Компьютерная оптика, 2018 We have examined different types of pulses and features of their frequency spectra. Calculations have shown that a significant distinction between the pulses only takes place at a very short pulse duration (shorter than the oscillation period).
Svetlana Khonina +2 more
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A minimal subwavelength focal spot for the energy flux
Компьютерная оптика, 2021 It is shown theoretically and numerically that circularly and linearly polarized incident beams produce at the tight focus identical circularly symmetric distributions of an on-axis energy flux.
S.S. Stafeev, V.D. Zaicev
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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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Tight-focusing parabolic reflector schemes for petawatt lasers
Optics Express, 2023 A comparative study of three different tight-focusing schemes for high-power lasers is performed numerically. Using the Stratton-Chu formulation, the electromagnetic field in the vicinity of the focus is evaluated for a short-pulse laser beam incident upon an on-axis high numerical aperture parabola (HNAP), an off-axis parabola (OAP), and a ...
Simon Vallières +6 more
openaire +2 more sources
Influence of initial phase of polarization on tight focusing of vector beam
Results in Optics, 2021 Generally, the influence of initial phase of polarization distribution of incident vector beams always is ignored in its tight focusing, because it just induce the whole rotation of polarization distribution.
Hehe Li +4 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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