Results 151 to 160 of about 112,176 (189)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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.
openaire +2 more sources
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
Frontiers in Optics, 2005
An optical vortex may exhibit a hallmark attributed to viscosity in classical fluids: solid-body rotation near the vortex core. This effect, attributed to spatial coherence properties, may be extended beyond optics to other wave systems. Non-quantized circulation results.
openaire +1 more source
An optical vortex may exhibit a hallmark attributed to viscosity in classical fluids: solid-body rotation near the vortex core. This effect, attributed to spatial coherence properties, may be extended beyond optics to other wave systems. Non-quantized circulation results.
openaire +1 more source
OPTICAL VORTEX INTERACTION IN LASERS
International Journal of Bifurcation and Chaos, 1994The Maxwell-Bloch equations describing the transverse modes of a large aspect ratio homogeneously broadened single-longitudinal-mode laser are solved numerically. The solutions are visualized by color-coding the intensity and phase of the transverse electric field at each time step and a video showing the detailed time evolution has been made.
Jeffery, Mark, D'Angelo, E. J.
openaire +2 more sources
Optics Communications, 2000
Specific rules are formulated that constrain relationships between optical vortex trajectories on a given manifold. Possible topologies for these trajectories are considered.
openaire +1 more source
Specific rules are formulated that constrain relationships between optical vortex trajectories on a given manifold. Possible topologies for these trajectories are considered.
openaire +1 more source