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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 ...
Yuri S. Kivshar +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 ...
Yuri S. Kivshar +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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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.
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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.
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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
Marat S. Soskin +2 more
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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
Marat S. Soskin +2 more
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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 A. 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 A. Swartzlander +5 more
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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.
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Specific rules are formulated that constrain relationships between optical vortex trajectories on a given manifold. Possible topologies for these trajectories are considered.
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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.
Alexey P. Porfirev +2 more
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The optical vortex coronagraph
Journal of Optics A: Pure and Applied Optics, 2009An optical vortex coronagraph is a high contrast imaging system which has the potential to completely extinguish light from an on-axis point source, allowing glare-free, high throughput imaging of off-axis targets. An important application is the direct detection of exoplanets orbiting distant stars.
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SPIE Proceedings, 2005
An optical vortex may be characterized as a dark core of destructive interference in a beam of spatially coherent light. This dark core may be used as a filter to attenuate a coherent beam of light so an incoherent background signal may be detected. Applications of such a filter include: eye and sensor protection, forward-scattered light measurement ...
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An optical vortex may be characterized as a dark core of destructive interference in a beam of spatially coherent light. This dark core may be used as a filter to attenuate a coherent beam of light so an incoherent background signal may be detected. Applications of such a filter include: eye and sensor protection, forward-scattered light measurement ...
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Optics and Photonics News, 2006
A helical-shaped phase mask can be used as a type of "optical vortex lens" that may lead to improvements in astronomical observation, the manipulation of micro-particles, optical pattern recognition and other areas.
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A helical-shaped phase mask can be used as a type of "optical vortex lens" that may lead to improvements in astronomical observation, the manipulation of micro-particles, optical pattern recognition and other areas.
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