Open AccessOrbital angular momentum sidebands of vortex beams transmitted through a thin metamaterial slab
Author(s) -
Wenguo Zhu,
Heyuan Guan,
Huihui Lu,
Jieyuan Tang,
Zhaihui Li,
Zhe Chen
Publication year - 2018
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.26.017378
Subject(s) - physics , angular momentum , sideband , optics , beam (structure) , light beam , optical vortex , metamaterial , slab , vortex , microwave , quantum mechanics , geophysics , thermodynamics
A pure vortex beam carrying m-order orbital angular momentum (OAM) will be deformed when transmitting through a thin slab, and "neighboring" sideband {m + 1} and {m-1} modes will emerge. The emergence of the OAM sideband is accompanied with OAM-dependent Goos-Hänchen (GH) shift. When the energies carried by the {m} mode of the transmitted beam and by the sideband modes are identical, the OAM-dependent shifts reach their upper limits, |m|w 0 /2(|m| + 1)1/2, where w 0 is the incident beam waist. The epsilon-near-zero metamaterial is found to be suitable to achieve the upper-limited OAM-dependent GH shifts. These findings provide a deeper insight into the beam shifts of vortex beams and have potential applications in the optical sensing, detection of OAM, and other OAM-based applications.