Results 251 to 260 of about 34,816 (291)
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SPIE Proceedings, 2006
A novel method for tuning the orbital angular momentum (OAM) content of a vortex beam is presented. This approach makes use of the shaping of the odd and even components of the helical phase profile associated to the vortex. A relative azimuthal shift of the components results in the harmonic variation of the magnitude of the OAM density of the ...
C. López-Mariscal +1 more
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A novel method for tuning the orbital angular momentum (OAM) content of a vortex beam is presented. This approach makes use of the shaping of the odd and even components of the helical phase profile associated to the vortex. A relative azimuthal shift of the components results in the harmonic variation of the magnitude of the OAM density of the ...
C. López-Mariscal +1 more
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Journal of the Optical Society of America A, 2008
Hollow beam formation of radially and azimuthally polarized vortex beams, which has arbitrary topological charge, is analytically discussed under the strong focusing condition. The expressions for the electric fields of the focused vector-vortex beams are obtained based on a vector diffraction theory.
Shunichi, Sato, Yuichi, Kozawa
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Hollow beam formation of radially and azimuthally polarized vortex beams, which has arbitrary topological charge, is analytically discussed under the strong focusing condition. The expressions for the electric fields of the focused vector-vortex beams are obtained based on a vector diffraction theory.
Shunichi, Sato, Yuichi, Kozawa
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Physical Review A, 2014
The concept that all de Broglie particles can form vortex beams is analyzed for neutral atoms. It is shown how atoms diffracted from a suitably constructed optical mask configuration employing light of $l$ units of orbital angular momentum and at far-off resonance with an atomic transition can lead to the generation of a discrete set of atom vortex ...
V. E. Lembessis +3 more
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The concept that all de Broglie particles can form vortex beams is analyzed for neutral atoms. It is shown how atoms diffracted from a suitably constructed optical mask configuration employing light of $l$ units of orbital angular momentum and at far-off resonance with an atomic transition can lead to the generation of a discrete set of atom vortex ...
V. E. Lembessis +3 more
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Vortex Coherent Beam Combining
Laser Congress 2021 (ASSL,LAC), 2021We propose Coherent Beam Combining with vortex wavefront to create an effective optical trap. More than 50 dB barrier height (wall to center irradiance ratio) for 127-hexagonal lattice was shown in numerical model.
Jan K. Jabczynski +4 more
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Vortex Hermite–Gaussian laser beams
Optics Letters, 2015We study elliptical vortex Hermite-Gaussian (vHG) beams, which are described by the complex amplitude proportional to the nth-order Hermite polynomial whose argument is a function of a real parameter a. At |a|1, similar isolated optical nulls of the vHG beams are found on the horizontal axis. At a=0, the vHG beam becomes identical to the HG mode of the
V V, Kotlyar +2 more
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Spatial intensity correlations of a vortex beam and a perfect optical vortex beam
Journal of the Optical Society of America A, 2019We present a model based on the Fresnel diffraction scheme for the spatial coherence function of random fields created by scattering optical vortex and perfect vortex beams. By using the spatial coherence function we showed analytically, numerically, and experimentally the dependence and independence of the speckle size of an optical vortex and perfect
Cristian Hernando, Acevedo +2 more
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Polarization basis for vortex beams
Journal of the Optical Society of America A, 2001Attention is called to a polarization basis formed by four Jones vectors that is reducible to two basic structures. In these states the field is linearly polarized at any point, but the polarization direction changes with the angular coordinate. Very simple equations hold for the field lines of these basis vectors.
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SPIE Proceedings, 2007
A beam shaping nietliod based on the superposition and unwinding of vortex beams is proposed. This method allows for the continuous tuning of the orbital angular momentum content and longitudinal intensity distribution of the beam. We provide with a closed expression for the orbital angular momentum content of a general superposition of vortex beams ...
Carlos López-Mariscal +1 more
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A beam shaping nietliod based on the superposition and unwinding of vortex beams is proposed. This method allows for the continuous tuning of the orbital angular momentum content and longitudinal intensity distribution of the beam. We provide with a closed expression for the orbital angular momentum content of a general superposition of vortex beams ...
Carlos López-Mariscal +1 more
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Elliptical Airyprime Vortex Beam
Optics Communications, 2023Dehao Chen +9 more
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Intracavity vortex beam generation
SPIE Proceedings, 2011In this paper we explore vortex beams and in particular the generation of single LG0l modes and superpositions thereof. Vortex beams carry orbital angular momentum (OAM) and this intrinsic property makes them prevalent in transferring this OAM to matter and to be used in quantum information processing.
Darryl Naidoo +2 more
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