Results 211 to 220 of about 25,544 (259)
Prior Expectations Bias Confidence Judgments Through Parietal Alpha‐Band Modulation
Advanced Science, EarlyView.ABSTRACT Humans possess the metacognitive ability to estimate the likely accuracy of their own decisions through confidence judgments. Yet, whether prior information shapes confidence and the neural mechanisms mediating such influence, remain to be determined.
Luca Tarasi +4 more
wiley +1 more source
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Optical vortex trapping of particles
Optics Letters, 1996We demonstrate three-dimensional trapping of low-index particles (20-microm-diameter hollow glass spheres in water) by using a single, strongly focused, stationary dark optical vortex laser beam. The holographically generated vortex, which is similar to a TEM(01)* mode beam, was also used to trap and form ring patterns of high-index particles.
G A Swartzlander
exaly +3 more sources
Nonlinear optical vortex coronagraph
Optics Letters, 2020A nonlinear optical vortex coronagraph (n-OVC) based on sum-frequency generation (SFG) in a periodically poled lithium niobate (PPLN) crystal is presented. We demonstrate an n-OVC by mixing the image of an on-axis point source ( λ s = 1.6 µ m ) inside the PPLN crystal with a pump beam (
Einstom Engay, Peter John Rodrigo
openaire +2 more sources
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
openaire +2 more sources
Physical Review A, 1993
We describe a phenomenon of nonlinear optics that occurs in the framework of transverse effects and optical vortices in lasers. We find that in a class-B laser vortices can never be at rest, but move, starting from an initial symmetry breaking of the direction of motion, continuously.
, Weiss +3 more
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We describe a phenomenon of nonlinear optics that occurs in the framework of transverse effects and optical vortices in lasers. We find that in a class-B laser vortices can never be at rest, but move, starting from an initial symmetry breaking of the direction of motion, continuously.
, Weiss +3 more
openaire +2 more sources
Optics Letters, 2009
We theoretically and experimentally demonstrate how "vectograph" film may be used to create arbitrarily complex vector fields having broadband phase features such as optical vortices.
Grover A, Swartzlander +4 more
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We theoretically and experimentally demonstrate how "vectograph" film may be used to create arbitrarily complex vector fields having broadband phase features such as optical vortices.
Grover A, Swartzlander +4 more
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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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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
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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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.
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