Results 251 to 260 of about 42,393 (288)

Composite optical vortices

Journal of the Optical Society of America B, 2003
Composite optical vortices may form when two or more beams interfere. Using analytical and numerical techniques, we describe the motion of these optical phase singularities as the relative phase or amplitude of two interfering collinear nonconcentric beams is varied.
Ivan D. Maleev, Grover A. Swartzlander, Jr.   +1 more
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Spatiotemporal Optical Vortices

2023
Light beams carrying orbital angular momentum (OAM) have become a mainstay of optical science and technology. In these beams, well-known examples of which are the Laguerre-Gaussian (LG_pm ) and Bessel-Gaussian (BG_m ) beams, the OAM vector points parallel or anti-parallel to propagation, and is associated with a phase winding 2πm in the plane ...
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Plasmonic tomography of optical vortices

Optics Letters, 2010
We present a method for analyzing the wavefront of optical vortices that does not involve interferometry but rather uses surface plasmon polaritons (SPPs). We employ a subwavelength slit in a gold film to cut slices from an optical vortex beam and measure the diffraction of the generated SPPs by scattering them off a second slit.
Philip F, Chimento, Gert W, 't Hooft, Eric R, Eliel   +2 more
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Femtosecond Optical Vortices in Air

Physical Review Letters, 2005
We examine the robustness of ultrashort optical vortices propagating freely in the atmosphere. We first approximate the stability regions of femtosecond spinning pulses as a function of their topological charge. Next, we numerically demonstrate that atmospheric optical vortices are capable of conveying high power levels in air over hundreds of meters ...
Antoine, Vinçotte, Luc, Bergé
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Quasi-monochromatic optical vortices

Proceedings of CAOL'2003. 1st International Conference on Advanced Optoelectronics and Lasers. Jontly with 1st Workshop on Precision Oscillations in Electronics and Optics (IEEE Cat. No.03EX715), 2004
The propagation of a circularly polarized singular beam through a single-axis crystal is accompanied by the appearance of additional singularities in the polarization structure of the beam field. These vector singularities combine to form concentric umbilic lines-degenerate umbilic point of the star type, thus significantly changing the entire ...
A.V. Volyar, Yu.A. Egorov
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Elliptic perfect optical vortices

Optik, 2018
Abstract We generalize the concept of perfect optical vortices, studying the elliptic perfect optical vortices (EPOVs), which also have diameters independent on the topological charge. A pure-phase diffractive optical element is proposed for efficient generation of such EPOV.
Victor V. Kotlyar, Alexey A. Kovalev, Alexey P. Porfirev   +2 more
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Optical Vortex Beams and Optical Vortices

Laser & Optoelectronics Progress, 2008
The basic principle, generation,transformation and application of optical vortex beams and optical vortices are briefly summarized, as well as their progress. A brief outlook about the future study and applications of optical vortex beams and optical vortices is discussed.
陆璇辉 LU Xuanhui, 黄慧琴 HUANG Huiqin, 赵承良 ZHAO Chengliang, 王将峰 WANG Jiangfeng, 陈和 CHEN He   +4 more
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Propagation invariant optical vortices

Frontiers in Optics, 2003
The most known propagation invariant optical fields (PIOFs) are the Bessel beams [1,2]. Those of high order are accompanied of a phase factor of the form exp(imφ) that represents a vortex structure with topological charge m. It happens that it is possible to obtain other PIOFs from the Helmholtz equation which also contain vortex structure.
J. C. Gutiérrez-Vega, S. Chávez-Cerda
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Diffraction of optical vortices

SPIE Proceedings, 1999
Computer 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, Marat S. Soskin, Mikhail V. Vasnetsov   +2 more
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Stationary nonlinear optical vortices

Optical Society of America Annual Meeting, 1992
Stationary nonlinear propagation has been known to exist in slab waveguides, but not in bulk media. We have discovered that a stationary dark nonlinear wave does exist, and we will present our experimental and numerical measurements. This mode occurs in defocusing type nonlinear media and appears as an optical vortex, i.e., a black spot around which ...
G. A. Swartzlander, C. T. Law
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