Results 71 to 80 of about 190,980 (288)
Vector vortex beams generated by q-plates as a versatile route to direct fs laser surface structuring [PDF]
, 2018 We report an experimental investigation on direct laser surface structuring with femtosecond vector vortex beams generated by means of q-plates with topological charges q = 1, 3/2, 2, 5/2.
Allahyari, Elaheh +9 more
core +1 more source
Filamentation of femtosecond vector beams
Physical Review A11 pages, 8 ...
Amirreza Sadeghpour +1 more
openaire +2 more sources
Negative propagation of vector Bessel beams
Journal of the Optical Society of America A, 2007 Energy characteristics of the superposition of TE- and TM-polarized electromagnetic Bessel beams are studied. For some phase differences between TE and TM waves the components of the Poynting vector vary in sign. We call this situation "negative propagation," because locally the beam may behave like a wave propagating in the direction opposite to the ...
Novitsky, Andrey V., Novitsky, Denis V.
openaire +3 more sources
Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites
Advanced Engineering Materials, EarlyView.Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter +9 more
wiley +1 more source
Switchable phase and polarization singular beams generation using dielectric metasurfaces
Scientific Reports, 2017 Singular beams which possess helical phase wavefront or spatially inhomogeneous polarization provide new freedom for optical field manipulation. However, conventional schemes to produce the singular beams have difficulty in realizing the flexible switch ...
Yanliang He +7 more
doaj +1 more source
Advanced Photonics Research, 2022 Wavefront shaping of structured light beams is attracting considerable attention in optics and related technologies. Due to the potential benefits, it is crucial to develop versatile methods for controlling the wavefront in a compact space with the ...
Yuji Sasaki +4 more
doaj +1 more source
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
doaj +1 more source
Vector solitons in (2+1) dimensions
, 1999 We address the problem of existence and stability of vector spatial solitons formed by two incoherently interacting optical beams in bulk Kerr and saturable media.
Andreas H. Carlsson +16 more
core +1 more source
Complete shaping of optical vector beams
Optics Express, 2015 We propose and experimentally demonstrate the complete and simultaneous modulation of the amplitude, phase and arbitrary state of polarization of optical beams. Based on a 4-f system including a spatial light modulator (SLM), two orthogonally polarized beams serving as the base vector components are produced by a computer generated hologram.
Zhaozhong, Chen +3 more
openaire +2 more sources
In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy
Advanced Engineering Materials, EarlyView.A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal +4 more
wiley +1 more source