2008/03/13 by G. D'Aguanno, Giuseppe D’Aguanno, N. Mattiucci +5
Materials Science · Mathematics · Physics and Astronomy · #Geometry #Lens (geology) #Mathematics #Mechanics #Metamaterial #Metamaterials and Metasurfaces Applications #Nonlinear Photonic Systems #Optical vortex #Optics #Orbital Angular Momentum in Optics #Physics #Plane (geometry) #Saddle #Saddle point #Vortex #physics.optics
paper · pdf · doi:10.1103/physreva.77.043825
arxiv created 2008/03/13 · openalex publication_date 2008/04/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that a superresolution process with 100% visibility is characterized by the formation of a point of phase singularity in free space outside a metamaterial in the form of a saddle with topological charge equal to \ensuremath-1. The saddle point is connected to two vortices at the end boundaries of the lens, and the two vortices are in turn connected to another saddle point inside the lens. The structure saddle-vortices-saddle is topologically stable. The formation of the saddle point in free space explains also the negative flux of energy present in a certain region of space outside the lens. The circulation strength of the power flow can be controlled by varying the position of the object plane with respect to the lens.