TY - JOUR
T1 - Optical vortices during a superresolution process in a metamaterial
AU - D'Aguanno, G.
AU - Mattiucci, N.
AU - Bloemer, M.
AU - Desyatnikov, A.
PY - 2008/4/17
Y1 - 2008/4/17
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=42449118893&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.77.043825
DO - 10.1103/PhysRevA.77.043825
M3 - Article
SN - 1050-2947
VL - 77
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 4
M1 - 043825
ER -