title: Generation of optical vortices by using spiral phase plates made of polarization dependent devices.
abstract: A method to construct spiral phase plates (SPPs) from quarter-wave plates and spatially variable half-wave plates (SVHWPs) is proposed. Optical vortices were experimentally generated by using SPPs made of polarization-dependent devices. The topological charge of the optical vortex can be also determined by the structure of the SVHWP and the polarization of the incident beam.
authors.forename: Jingtao
authors.initials: J
authors.lastname: Xin
authors.forename: Kunjian
authors.initials: K
authors.lastname: Dai
authors.forename: Lei
authors.initials: L
authors.lastname: Zhong
authors.forename: Quanxin
authors.initials: Q
authors.lastname: Na
authors.forename: Chunqing
authors.initials: C
authors.lastname: Gao