Title: Generation and Manipulation of Orbital Angular Momentum by All-Dielectric Metasurfaces
Author(s): Guo, YH (Guo, Yinghui); Yan, LS (Yan, Lianshan); Pan, W (Pan, Wei); Luo, B (Luo, Bin)
Source: PLASMONICS  Volume: 11  Issue: 1  Pages: 337-344  DOI: 10.1007/s11468-015-0055-7  Published: FEB 2016 
Abstract: We propose the design of a planar dielectric metasurface to overcome the ohmic loss and discrete phase profile of metallic metasurfaces. The proposed metasurface is composed of annular subwavelength gratings, which can be taken regard as a space-variant Pancharatnam-Berry phase optical element. Consequently, the OAM-carrying beams with topological charge a"" = +/- 2 is generated with the efficiency high up to 90 %. In addition, we demonstrate a method to produce fractional, quasi-focusing, and quasi-non-diffracting OAM-carrying beams by adopting appropriate width modulation of the annular gratings. The proposed metasurfaces offering superiorities in high efficiency, phase continuity, and manipulative diversity may have potential applications in integrated-photonics and optical communication system.
Accession Number: WOS:000368731200044
IDS Number: DB7XR
ISSN: 1557-1955
eISSN: 1557-1963