Results 251 to 260 of about 113,143 (287)
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Entangled transverse optical vortex
Optics Letters, 2014We discuss a new kind of optical vortex with the angular momentum perpendicular to the flow direction and entangled in that it is a coherent combination of different orbital angular momentum states of the same sign. This entangled state exhibits many unexpected physical properties.
S T, Chui, Zhifang, Lin
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Frontiers in Optics, 2005
We describe a method to observe dim exoplanets that eliminates light from the parent star across the entire exit pupil without sacrificing light from the planet by use of a vortex mask of topological charge m = 2.
Gregory, Foo +2 more
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We describe a method to observe dim exoplanets that eliminates light from the parent star across the entire exit pupil without sacrificing light from the planet by use of a vortex mask of topological charge m = 2.
Gregory, Foo +2 more
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Asymmetric Gaussian optical vortex
Optics Letters, 2016We theoretically study a Gaussian optical beam with an embedded off-axis optical vortex. We also experimentally generate such an asymmetric Gaussian optical vortex by using an off-axis spiral phase plate. It is shown that depending on the shift distance the laser beam has the form of a crescent, which is rotated upon propagation.
Victor V, Kotlyar +2 more
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2020 International Conference on Information Technology and Nanotechnology (ITNT), 2020
In this review the author presents the major works, that according to his opinion have played a historically important part in the formation and development of one of the most mysterious sections of modern optics - vortex (or singular) optics. Singular optics studies the behavior of light in the areas where there is no light - at zeros of intensity. An
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In this review the author presents the major works, that according to his opinion have played a historically important part in the formation and development of one of the most mysterious sections of modern optics - vortex (or singular) optics. Singular optics studies the behavior of light in the areas where there is no light - at zeros of intensity. An
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Frontiers in Optics 2007/Laser Science XXIII/Organic Materials and Devices for Displays and Energy Conversion, 2007
The optical vortex coronagraph is a promising scheme for achieving high contrast low loss imaging of exoplanets. Observatory and laboratory measurements will be presented and analyzed. Procedures for achieving improved performance will be described.
Grover A. Swartzlander +7 more
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The optical vortex coronagraph is a promising scheme for achieving high contrast low loss imaging of exoplanets. Observatory and laboratory measurements will be presented and analyzed. Procedures for achieving improved performance will be described.
Grover A. Swartzlander +7 more
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CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009
Optical guiding of particles is traditionally associated with forces of radiation pressure, and a vast majority of optical traps are based on the ponderomotive forces. However, the developed analysis suggests an additional possibility of trapping which stems from thermal interaction of the laser-irradiated particle and environment via photophoretic ...
Vladlen G. Shvedov +5 more
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Optical guiding of particles is traditionally associated with forces of radiation pressure, and a vast majority of optical traps are based on the ponderomotive forces. However, the developed analysis suggests an additional possibility of trapping which stems from thermal interaction of the laser-irradiated particle and environment via photophoretic ...
Vladlen G. Shvedov +5 more
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Frontiers in Optics, 2003
Optical vortices can provide mechanisms for micromanipulation of micron or sub-micron sized particles as well as a means to generate complicated array patterns. Particularly interesting is the way in which higher order vortices can be triggered by a secondary optical field to explode or implode.
Michael A. Fiddy +1 more
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Optical vortices can provide mechanisms for micromanipulation of micron or sub-micron sized particles as well as a means to generate complicated array patterns. Particularly interesting is the way in which higher order vortices can be triggered by a secondary optical field to explode or implode.
Michael A. Fiddy +1 more
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Achromatic optical vortex lens
Optics Letters, 2006A vortex lens is a useful optical device having applications ranging from astronomy to microscopy. Current vortex masks operate across a narrow bandwidth. Two design schemes are proposed for creating a vortex across a bandwidth exceeding 100 nm in the visible region of the spectrum.
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Optics Communications, 2001
Abstract A structure of wavefront edge dislocations and associated “transversal” optical vortices in an interference field of two two-dimensional Gaussian beams is analyzed. It was shown that the optical vortex rotation is directed toward the area of higher phase velocity in the interference field (the origin of the phase velocity variation is due to
V.A Pas'ko, M.S Soskin, M.V Vasnetsov
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Abstract A structure of wavefront edge dislocations and associated “transversal” optical vortices in an interference field of two two-dimensional Gaussian beams is analyzed. It was shown that the optical vortex rotation is directed toward the area of higher phase velocity in the interference field (the origin of the phase velocity variation is due to
V.A Pas'ko, M.S Soskin, M.V Vasnetsov
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Frontiers in Optics 2004/Laser Science XXII/Diffractive Optics and Micro-Optics/Optical Fabrication and Testing, 2004
Starlight transmitted through an optical vortex was observed to form a dark core in the image of the star despite atmospheric turbulence. This affords opportunities to use optical vortices in the hunt for extrasolar planets and zodiacal dust. Observations using a 60-inch f/16 telescope will be reported.
Grover Swartzlander +5 more
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Starlight transmitted through an optical vortex was observed to form a dark core in the image of the star despite atmospheric turbulence. This affords opportunities to use optical vortices in the hunt for extrasolar planets and zodiacal dust. Observations using a 60-inch f/16 telescope will be reported.
Grover Swartzlander +5 more
openaire +1 more source