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Polarization evolution of vector beams generated by q-plates
- Source :
- Photonics Research. 5:64
- Publication Year :
- 2017
- Publisher :
- The Optical Society, 2017.
-
Abstract
- The polarization evolution of vector beams (VBs) generated by q-plates is investigated theoretically and experimentally. An analytical model is developed for the VB created by a general quarter-wave q-plate based on vector diffraction theory. It is found that the polarization distribution of VBs varies with position and the value q. In particular, for the incidence of circular polarization, the exit vector vortex beam has polarization states that cover the whole surface of the Poincare sphere, thereby constituting a full Poincare beam. For the incidence of linear polarization, the VB is not cylindrical but specularly symmetric, and exhibits an azimuthal spin splitting. These results are in sharp contrast with those derived by the commonly used model, i.e., regarding the incident light as a plane wave. By implementing q-plates with dielectric metasurfaces, further experiments validate the theoretical results.
- Subjects :
- Physics
Diffraction
Polarization rotator
Condensed matter physics
Linear polarization
Plane wave
Physics::Optics
Polarization (waves)
01 natural sciences
Ray
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Computational physics
010309 optics
0103 physical sciences
010306 general physics
Optical vortex
Circular polarization
Subjects
Details
- ISSN :
- 23279125
- Volume :
- 5
- Database :
- OpenAIRE
- Journal :
- Photonics Research
- Accession number :
- edsair.doi...........9ad81a8c79962c25418b168627087c09