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Measuring the topological charge of vortex beams by using an annular ellipse aperture
Measuring the topological charge vortex beams an annular ellipse aperture
2013/7/3
We theoretically and experimentally investigate the Fraunhofer diffraction pattern of a vortex beam passing through an annular ellipse aperture. It is found that the pat-tern of the far-field diffract...
Detecting the topological charge of vortex beams using an annular triangle aperture
Vortex beam Topological charge Annular triangle aperture
2013/7/3
The Fraunhofer diffraction pattern of a vortex beam by an annular triangle aperture is analyzed theoretically and experimentally. It is found that the pattern of the far-field diffraction intensity di...
Stable structures with high topological charge in nonlinear photonic quasicrystals
Stable structures high topological charge photonic quasicrystals
2010/4/2
Stable vortices with topological charge of 3 and 4 are examined numerically and analytically in photonic quasicrystals created by interference of 5 as well as 8 beams, in the cases of cubic as well as...
Measuring the Topological Charge of Integer and Fraction Vortices Using Multipoint Plates
vortex beams multipoint plates interference
2013/7/3
The topological charge of integral vortex beams with a single circle of multipoints has previously been measured. In this work, we theoretically and experimental study the diffraction patterns of vort...
Beam-spreading and topological charge of vortex beams propagating in a turbulent atmosphere
Vortex beams Turbulent atmosphere Beam-spreading Orbital angular momentum
2013/7/3
We theoretically and experimentally investigate the beam-spreading of a vortex beam propagating in a turbulent atmosphere. It is found that the vortex beam is less affected by turbulence than a non-vo...
Topological Charge Screening and Pseudoscalar Glueballs
Topological Charge Screening Pseudoscalar Glueballs
2010/10/25
Topological charge screening in the QCD vacuum is found to provide crucial nonperturbative contributions to the short-distance expansion of the pseudoscalar (0¡+) glueball correlator. The screen...