Journal
JOURNAL OF OPTICS
Volume 17, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/17/4/045102
Keywords
metamaterials; optical vortices; angular momentum
Categories
Funding
- National Natural Science Foundation of China [11374077]
- Foundation of Hefei University of Technology of China [HFUT.407-037026]
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The ultra-thin optical vortex phase plate (VPP) has been designed and investigated based on the metasurface of the metal rectangular split-ring resonators (MRSRRs) array. The circularly polarized incident light can convert into corresponding cross-polarization transmission light, and the phase and the amplitude of cross-polarization transmission light can be simultaneously governed by modulating two arms of the MRSRR. The MRSRR has been arranged in a special order for forming an ultra-thin optical VPP that can covert a plane wave into a vortex beam with a variety of the topological charges, and the transformation between spin angular momentum (SAM) and orbital angular momentum (OAM) has been discussed in detail. The multi-spectral characteristics of the VPP have also been investigated, and the operating bandwidth of the designed VPP is 190 nm (in the range of 710-900 nm), which enable a potential implication for integrated optics and vortex optics.
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