title: Independent Manipulation of Topological Charges and Polarization Patterns of Optical Vortices.
abstract: We present a simple and flexible method to generate various vectorial vortex beams (VVBs) with a Pancharatnam phase based on the scheme of double reflections from a single liquid crystal spatial light modulator (SLM). In this configuration, VVBs are constructed by the superposition of two orthogonally polarized orbital angular momentum (OAM) eigenstates. To verify the optical properties of the generated beams, Stokes polarimetry is developed to measure the states of polarization (SOP) over the transverse plane, while a Shack-Hartmann wavefront sensor is used to measure the OAM charge of beams. It is shown that both the simulated and the experimental results are in good qualitative agreement. In addition, polarization patterns and OAM charges of generated beams can be controlled independently using the proposed method.
authors.affiliation: Department of Photonics, National Cheng Kung University, Tainan 701, Taiwan.
authors.forename: Ching-Han
authors.initials: CH
authors.lastname: Yang
authors.affiliation: Laser and Additive Manufacturing Technology Center, Industrial Technology Research Institute, Tainan City 734, Taiwan.
authors.forename: Yuan-Di
authors.initials: YD
authors.lastname: Chen
authors.affiliation: Department of Physics, National Cheng Kung University, Tainan 701, Taiwan.
authors.forename: Shing-Trong
authors.initials: ST
authors.lastname: Wu
authors.affiliation: Department of Photonics, National Cheng Kung University, Tainan 701, Taiwan.|Department of Physics, National Cheng Kung University, Tainan 701, Taiwan.|Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan 701, Taiwan.
authors.forename: Andy Ying-Guey
authors.initials: AY
authors.lastname: Fuh