2006/06/30 by Fabrizio Tamburini, F. Tamburini, G. Anzolin +4 · 4 citations
Biochemistry, Genetics and Molecular Biology · Engineering · Physics and Astronomy · #Angular momentum #Beam (structure) #Diffraction #Holography #Magnetic and Electromagnetic Effects #Microfluidic and Bio-sensing Technologies #Monochromatic color #Optical vortex #Optics #Orbital Angular Momentum in Optics #Physics #Quantum mechanics #Rayleigh scattering #astro-ph #physics.optics
paper · pdf · doi:10.1103/physrevlett.97.163903
published as Phys.Rev.Lett.97:163903,2006 · 4 pages, 5 figures
arxiv created 2006/08/31 · openalex publication_date 2006/10/16 · arxiv updated 2014/10/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We experimentally and numerically tested the separability of two independent equally luminous monochromatic and white light sources at the diffraction limit, using optical vortices (OV). The diffraction pattern of one of the two sources crosses a fork hologram on its center generating the Laguerre-Gaussian (LG) transform of an Airy disk. The second source, crossing the fork hologram in positions different from the optical center, generates nonsymmetric LG patterns. We formulated a criterion, based on the asymmetric intensity distribution of the superposed LG patterns so created, to resolve the two sources at angular distances much below the Rayleigh criterion. Analogous experiments in white light allow angular resolutions which are still one order of magnitude below the Rayleigh criterion. The use of OVs might offer new applications for stellar separation in future space experiments.