Structured caustic vector vortex optical field: manipulating optical angular momentum flux and polarization rotation

被引:46
作者
Chen, Rui-Pin [1 ]
Chen, Zhaozhong [2 ]
Chew, Khian-Hooi [3 ]
Li, Pei-Gang [1 ]
Yu, Zhongliang
Ding, Jianping [2 ]
He, Sailing [4 ,5 ,6 ,7 ]
机构
[1] Zhejiang Sci Tech Univ, Dept Phys, Hangzhou 310018, Zhejiang, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[3] Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China
[4] Univ Malaya, Dept Phys, Fac Sci, Kuala Lumpur 50603, Malaysia
[5] Zhejiang Univ, Ctr Opt & Electromagnet Res, Hangzhou, Zhejiang, Peoples R China
[6] Royal Inst Technol, Joint Res Ctr Photon, Stockholm, Sweden
[7] Zhejiang Univ, Hangzhou, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
BEAMS; GENERATION; PHASE; GAUSS; LASER;
D O I
10.1038/srep10628
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
A caustic vector vortex optical field is experimentally generated and demonstrated by a caustic-based approach. The desired caustic with arbitrary acceleration trajectories, as well as the structured states of polarization (SoP) and vortex orders located in different positions in the field cross-section, is generated by imposing the corresponding spatial phase function in a vector vortex optical field. Our study reveals that different spin and orbital angular momentum flux distributions (including opposite directions) in different positions in the cross-section of a caustic vector vortex optical field can be dynamically managed during propagation by intentionally choosing the initial polarization and vortex topological charges, as a result of the modulation of the caustic phase. We find that the SoP in the field cross-section rotates during propagation due to the existence of the vortex. The unique structured feature of the caustic vector vortex optical field opens the possibility of multi-manipulation of optical angular momentum fluxes and SoP, leading to more complex manipulation of the optical field scenarios. Thus this approach further expands the functionality of an optical system.
引用
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页数:8
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