High efficiency generation of tunable ellipse perfect vector beams
We present a highly efficient method of generating and shaping ellipse perfect vector beams (EPVBs) with a 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 the base vector components. The phase-only computer-generated hologram is specifically designed by means of a modified iteration algorithm involving a complex amplitude constraint, which is able to generate an 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 the conventional complex amplitude 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 transversal (2D) and axial (3D) focusing structures, proving potentials in a variety of polarization-mediated applications such as trapping and transportation of particles in more complex geometric circumstances.
基金项目：National Key R&D Program of China (2018YFA0306200); National Natural Science Foundation of China (NSFC)10.13039/501100001809 (91750202, 11474156, 61605080, 61775097); China Postdoctoral Science Foundation10.13039/501100002858 (2016M601775).
Chenliang Chang：Jiangsu Key Laboratory for Opto-Electronic Technology, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, ChinaNational Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, Chinae-mail: email@example.com
Caojin Yuan：Jiangsu Key Laboratory for Opto-Electronic Technology, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China
Shaotong Feng：Jiangsu Key Laboratory for Opto-Electronic Technology, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China
Shouping Nie：Jiangsu Key Laboratory for Opto-Electronic Technology, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China
Zhi-Cheng Ren：National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China
Hui-Tian Wang：National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China
Jianping Ding：National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, Chinae-mail: firstname.lastname@example.org
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Lin Li, Chenliang Chang, Caojin Yuan, Shaotong Feng, Shouping Nie, Zhi-Cheng Ren, Hui-Tian Wang, and Jianping Ding, "High efficiency generation of tunable ellipse perfect vector beams," Photonics Research 6(12), 1116-1123 (2018)