title: Generating orthogonally circular polarized states embedded in nonplanar geometric beams.
abstract: We experimentally demonstrated the generation of orthogonally circular polarized states embedded in nonplanar geometric beams. Experimental results revealed that the production of circularly polarized beams, induced by crystal birefringence, is quantized. Numerical analyses of the polarization and the spatial morphology are consistent with the experimental results.
authors.forename: T H
authors.initials: TH
authors.lastname: Lu
authors.forename: C H
authors.initials: CH
authors.lastname: He