Results 221 to 230 of about 4,520 (260)
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Journal of Optics, 2011
METATOYs are regular structures of optical elements that change the direction of light rays according to various generalized refraction laws. They may introduce discontinuities into transmitted wavefronts and create ray fields that do not have wave-optical analogies.
Johannes Courtial, Tomáš Tyc
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METATOYs are regular structures of optical elements that change the direction of light rays according to various generalized refraction laws. They may introduce discontinuities into transmitted wavefronts and create ray fields that do not have wave-optical analogies.
Johannes Courtial, Tomáš Tyc
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Diffraction of optical vortices
SPIE Proceedings, 1999Computer simulation of optical vortex diffraction on edge of nontransparent screen demonstrates the possibility for optical vortex to restore from the part of beam passing trough aperture. Regeneration of vortex is shown to take place for any part of the beam passing trough aperture, even if it does not contain vortex core.
I. G. Marienko +2 more
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Conference on Coherence and Quantum Optics, 2007
Optical vortices are nodal lines in 3D optical fields. These lines exist in various topologies. In this paper, the vortex topology in random light fields is investigated numerically with results given for loop size distribution.
K. O’Holleran +2 more
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Optical vortices are nodal lines in 3D optical fields. These lines exist in various topologies. In this paper, the vortex topology in random light fields is investigated numerically with results given for loop size distribution.
K. O’Holleran +2 more
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Optical Vortices and Their Propagation
Journal of Modern Optics, 1993Abstract Free space propagation of an array of optical vortices nested in a smooth (Gaussian) beam is studied in the paraxial regime. It is found that when the vortices have all the same charge, their relative positions, as well as their positions within the host beam are invariant upon propagation.
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Science, 2020
Topological Optics Light has several degrees of freedom (wavelength, polarization, pulse length, and so on) that can be used to encode information. A light beam or pulse can also be structured to have the property of orbital angular momentum, becoming a vortex.
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Topological Optics Light has several degrees of freedom (wavelength, polarization, pulse length, and so on) that can be used to encode information. A light beam or pulse can also be structured to have the property of orbital angular momentum, becoming a vortex.
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26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020
Based on numerical simulation, the diffraction of vortex beams on a circular opaque screen in a homogeneous medium using the example of Laguerre-Gaussian beam modes is calculated. An analysis of an evolution of diffracted beams from the degree of its overlap by a round screen is performed.
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Based on numerical simulation, the diffraction of vortex beams on a circular opaque screen in a homogeneous medium using the example of Laguerre-Gaussian beam modes is calculated. An analysis of an evolution of diffracted beams from the degree of its overlap by a round screen is performed.
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SPIE Proceedings, 2014
Optical vortices are always created or annihilated in pairs with opposite topological charges. However, the presence of such a vortex dipole does not directly indicate whether they are associated with a creation or an annihilation event. Here we propose a method to distinguish between vortex dipoles that have just been created and those that are about ...
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Optical vortices are always created or annihilated in pairs with opposite topological charges. However, the presence of such a vortex dipole does not directly indicate whether they are associated with a creation or an annihilation event. Here we propose a method to distinguish between vortex dipoles that have just been created and those that are about ...
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2014
Optical vortex beams are of scientific interest since decades. This chapter presents the first-ever realization of optical vortex beam generation in the extreme ultraviolet and discusses possible applications towards high-resolution imaging.
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Optical vortex beams are of scientific interest since decades. This chapter presents the first-ever realization of optical vortex beam generation in the extreme ultraviolet and discusses possible applications towards high-resolution imaging.
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