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Compact cascaded meta-surface system for controlling the spin and orbital angular momentum of electromagnetic fields simultaneously
- Source :
- Optics Express. 29:20229
- Publication Year :
- 2021
- Publisher :
- Optica Publishing Group, 2021.
-
Abstract
- We propose a compact cascaded meta-surface system (CCMS) to produce well converged orbital angular momentum (OAM) vortex waves with tailored spin angular momentum (SAM) by integrating a meta-surface lens (ML) with an assistant meta-mirror (AM). Specifically, the co-linearly polarized (LP) waves from the feed would be reflected by the ML firstly and then twisted into the cross-LP counterparts by the AM to penetrate the ML for the perfect synthesis of the OAM vortex beams while performing the linear-to-circular polarization conversion. Especially, the CCMS can pack the ML and the AM closely together with a quarter of the ML focal length when we apply proper phase distributions on the AM. In addition, the proposed CCMS can readily be extended to the generation of multiple circularly polarized OAM vortex waves with different modes. Our design should thus pave the way for building up more efficient wireless communication systems with expanded channel capacity.
- Subjects :
- Wavefront
Electromagnetic field
Physics
Angular momentum
business.industry
Phase (waves)
02 engineering and technology
021001 nanoscience & nanotechnology
Polarization (waves)
01 natural sciences
Atomic and Molecular Physics, and Optics
Vortex
010309 optics
Optics
0103 physical sciences
Focal length
0210 nano-technology
Spin (physics)
business
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- Optics Express
- Accession number :
- edsair.doi.dedup.....6d8a8e5c9b4abbdb414ceb2737b388b7