Results 31 to 40 of about 1,485,281 (291)
Diffraction Impact onto Regularized Plasma Channel Formation by Femtosecond Laser Filamentation
Photonics, 2023 Focused femtosecond beam filamentation after amplitude masks has been studied experimentally and numerically. We deduced conditions (energy per hole, diameter and geometrical composition of holes, focal length) providing for the formation of the ...
Ekaterina Mitina +7 more
doaj +1 more source
Subwavelength diffraction management [PDF]
Optics Letters, 2008 We study light propagation in nanoscale periodic structures composed of dielectric and metal in the visible range. We demonstrate that diffraction can be tailored both in magnitude and in sign by varying the geometric features of the waveguides. Diffraction management on a subwavelength scale is demonstrated by numerical solution of Maxwell equations ...
CONFORTI, Matteo +2 more
openaire +4 more sources
Electromagnetic wave diffraction on a “strip grating – ferromagnetic half-space” composite structure: surface-wave resonances [PDF]
Радиофизика и электроника, 2020 Subject and Purpose. A theoretic study is given to the diffraction of a monochromatic plane E-polarized electromagnetic wave on a composite structure like a periodic strip grating bordering a half-space filled with a lossy homogeneous gyrotropic ...
A.V. Brovenko +3 more
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A comment on the relation between diffraction and entropy [PDF]
, 2012 Diffraction methods are used to detect atomic order in solids. While uniquely ergodic systems with pure point diffraction have zero entropy, the relation between diffraction and entropy is not as straightforward in general.
Baake +12 more
core +6 more sources
Diffraction before destruction [PDF]
Philosophical Transactions of the Royal Society B: Biological Sciences, 2013 X-ray free-electron lasers have opened up the possibility of structure determination of protein crystals at room temperature, free of radiation damage. The femtosecond-duration pulses of these sources enable diffraction signals to be collected from samples at doses of 1000 MGy or higher.
H. N. Chapman, C. Caleman, N. Timneanu
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Band-edge-induced Bragg diffraction in two-dimensional photonic crystals [PDF]
, 2006 Two-dimensional photonic crystals composed of two orthogonal volume diffraction gratings have been photogenerated in photopolymers. When the read beam is set at the Bragg angle, the diffraction efficiency of the transmission grating is strongly enhanced ...
Chevallier, Raymond +5 more
core +3 more sources
Diffraction propagation of vortex diffractals
Journal of Physics: Conference Series, 2021 Abstract A brief retrospective analysis of studies of fractal light radiation is carried out. To assess the prospects of this scientific direction, new original results of studying the diffraction propagation of vortex wave beams with a fractal structure (vortex diffractals) are also presented.
P Korolenko +3 more
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Journal of Applied Sciences and Environmental Management, 2005 This study aimed at demonstrating complementary roles offered by both Fourier transform infrared (FTIR) spectrophotometry and x-ray powder diffraction (XRPD) techniques in characterizing clay size fraction of kaolins.
Georges-Ivo E Ekosse
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Quantum theory of light diffraction
, 2011 At present, the theory of light diffraction only has the simple wave-optical approach. In this paper, we study light diffraction with the approach of relativistic quantum theory. We find that the slit length, slit width, slit thickness and wave-length of
Bai-Jun Zhang +11 more
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Can Kinematic Diffraction Distinguish Order from Disorder? [PDF]
, 2009 Diffraction methods are at the heart of structure determination of solids. While Bragg-like scattering (pure point diffraction) is a characteristic feature of crystals and quasicrystals, it is not straightforward to interpret continuous diffraction ...
Baake, Michael, Grimm, Uwe
core +2 more sources