Optical vortices during a superresolution process in a metamaterial

G. D'Aguanno, N. Mattiucci, M. Bloemer, A. Desyatnikov

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


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 -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.

Original languageEnglish
Article number043825
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number4
Publication statusPublished - Apr 17 2008

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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