Open AccessWave front engineering from an array of thin aperture antennas
Author(s) -
Ming Kang,
Tianhua Feng,
HuiTian Wang,
Jensen Li
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.015882
Subject(s) - optics , wavefront , metamaterial , physics , aperture (computer memory) , diffraction , discontinuity (linguistics) , rotation (mathematics) , bent molecular geometry , materials science , geometry , mathematical analysis , mathematics , acoustics , composite material
We propose an ultra-thin metamaterial constructed by an ensemble of the same type of anisotropic aperture antennas with phase discontinuity for wave front manipulation across the metamaterial. A circularly polarized light is completely converted to the cross-polarized light which can either be bent or focused tightly near the diffraction limit. It depends on a precise control of the optical-axis profile of the antennas on a subwavelength scale, in which the rotation angle of the optical axis has a simple linear relationship to the phase discontinuity. Such an approach enables effective wave front engineering within a subwavelength scale.