The Generation And Control Of A New Spatial Multi-dimensional Vector Light Field

The regulating of local polarization state of an optical beam has become an interesting and hot topic in optical eomplex beam shaping.Perfect vector beams(PVBs)with inhomogeneous polarization distribution and tunable beam dimensions have shown great potential in a variety of applications including optical micro-particle manipulation,super-resolution imaging and light-matter interactions.This thesis focuses on the generation and control of novel vector beam.Firstly,we propose an approach for creating optical vortex array(OVA)arranged along arbitrary curvilinear path,based on the coaxial interference of two width-controllable component curves calculated by modified holographic beam shaping technique.The two component curve beams have different radial dimensions as well as phase gradients along each beam such that the number of phase singularity in the curvilinear arranged optical vortex array(CA-OVA)is freely tunable on demand.Hybrid CA-OVA that comprises of multiple OVA structures along different respective curves is also discussed and demonstrated.Furthermore,we study the eonversion of CA-OVA into vector mode that comprises of polarization vortex array with varied polarization state distribution.Both simulation and experimental results prove the performance of the proposed method of generating a conplex structured vortex array,which is of significance for potential applications including multiple trapping of micro-sized particles.Secondly,we present an approach for creating polarization singularity array(PSA)along curvilinear structure by exploring the scheme of coaxially superposing predesigned component vector beams.Each component vector beam has independently and azimuthally modulated inhomogeneous polarization distribution based on the combination of holographic beam shaping technique and vector beam generation scheme,such that the polarization singularities lattice arranged in tunable curvilinear structure and locations appear after the superposition of eomponent vector beams.Moreover,even more intricate PSA geometric fields comprising multiple-layered curvilinear tracked PSA are also demonstrated by superposing more prescribed vector cxirve beams.We believe that the results presented herein may have important implications in both understanding of the properties of vector beam families and finding potential applications in terms of imaging,optical manipulation,and atom optics.Finally,we present a high efficient method of generating and shaping ellipse perfect vector beams(EPVB)with prescribed ellipse intensity profile and continuously variant linear polarization state.The scheme is based on the coaxial superposition of two orthogonally polarized ellipse laser beams of controllable phase vortex serving as base vector compnents.The phase-only CGH is specifically designed by means of a modified iteration algorithm involving complex amplitude constraint,which is able to generate EPVB with high diffraction efficiency in the vector optical field generator.We experimentally demonstrate that the efficiency of generating the EPVB has a notable improvement from 1.83%in conventional complex arnplitude modulation based technique to 11.1%in our method.We also discuss and demonstrate the simultaneous shaping of multiple EPVBs with independent tunable ellipticity and polarization vortex in both of transversal(2D)and axial(3D)focusing structures,proving potentials in a variety of polarization-mediated applications such as trapping and transportation of particles in a more complex geometry circumstances.