Results 271 to 280 of about 67,616 (299)

Simulation of Tight Focusing of Laser Light by Gold Zone Plate

2018 20th International Conference on Transparent Optical Networks (ICTON), 2018
In this paper amplitude Fresnel zone plates with gold relief on silica glass is investigated by using frequency dependent finite difference time domain method. During the simulation linearly and circularly polarized Gaussian beams with wavelength of 532 nm are proposed as incident light.
Elena S. Kozlova, Victor V. Kotlyar
openaire   +1 more source

Tight focusing of radially polarized Gaussian and Bessel-Gauss beams

Optics Letters, 2007
We examine the effects of tightly focusing a radially polarized beam with uniform, Gaussian, or Bessel-Gauss pupil functions. The resulting FWHM is smallest for the case of a uniform amplitude profile, while the Bessel-Gauss beam results in the largest FWHM.
Yew, E.Y.S., Sheppard, C.J.R.
openaire   +2 more sources

Short pulse propagation in tight focusing conditions

Optics Communications, 2001
Abstract We report short pulse propagation simulation data generated by 3 D +1 (x,y,z,t) code which takes into account space–time Laplacian, up to cubic term dispersion, delayed Kerr non-linearity, optical shock term and multi-photon ionization.
openaire   +1 more source

High-field harmonic generation in the tight-focusing limit

Journal of the Optical Society of America B, 1996
We report measurements of seventh-harmonic generation in xenon, using a femtosecond Ti:sapphire laser operating at ∼763 nm, at intensities of as much as 2 × 1014 W/cm2. Several atomic levels in xenon are nearly resonant with the seventh harmonic; as a consequence, the phase mismatch exhibits strong variations as a function of frequency.
D. M. Mittleman, D. C. Douglass, Z. Henis, O. R. Wood, R. R. Freeman, T. J. McIlrath   +5 more
openaire   +1 more source

Tight focusing polychromatic structured light

Laser Beam Shaping XXI, 2021
Manuel F. Ferrer-Garcia, Alessio D'Errico, Hugo Larocque, Alicia Sit, Ebrahim Karimi   +4 more
openaire   +1 more source

Numerical analysis of tight focusing and scattering of Singular Beams

2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel, 2008
Singular beams have recently been employed for metrological applications requiring nanoscale sensitivity. The achievable sensitivity depends on the numerical aperture of the involved optical system. While high numerical aperture provides more information about the investigated object, it introduces a number of difficulties when a rigorous analysis of ...
Alexander Normatov, Boris Spektor, Joseph Shamir   +2 more
openaire   +1 more source

Tight Focusing of Proton Beam and Its Interaction with Targets

1991
A high-bright, self-magnetically insulated, coaxial ion beam diode, “Plasma Focus Diode” (PFD), was successfully developed and studied systematically. Using such the tightly focused beam, we investigated the ion beam energy deposition in the intense beam-target interaction.
Weihua Jiang, Katsumi Masugata, Kiyoshi Yatsui   +2 more
openaire   +1 more source

Boosting MIR to THz conversion with tight focusing

2022 International Conference Laser Optics (ICLO), 2022
I.A. Nikolaeva, D.E. Shipilo, N.A. Panov, O.G. Kosareva   +3 more
openaire   +1 more source

Tight Focusing of Fractional Ellipse Field Polarization Singularities

Frontiers in Optics + Laser Science 2024 (FiO, LS)
We study the tight focusing of fractional ellipse field polarization singularities. For these optical fields, the strengths of transverse components at the focal plane depend on the value of the orbital angular momentum of the vortex beam.
Sushanta Kumar Pal, Leslie A. Rusch
openaire   +1 more source

Tight-focusing evolution of linearly polarized auto-focusing circular Bessel-Gaussian vortex beam

Optics Communications, 2023
Zhili Lu, Yinjie Meng, Dongmei Deng
exaly