Optical spin-to-orbital angular momentum conversion in the near field of a highly nonparaxial optical field with hybrid states of polarization

被引：34
作者：
Chen, Rui-Pin [1 ]
Chew, Khian-Hooi [2 ]
Dai, Chao-Qing [3 ]
Zhou, Guoquan [3 ]
机构：
[1] Zhejiang Sci Tech Univ, Dept Phys, Hangzhou 310018, Zhejiang, Peoples R China
[2] Univ Malaya, Fac Sci, Ctr Theoret Phys, Dept Phys, Kuala Lumpur 50603, Malaysia
[3] Zhejiang A&F Univ, Sch Sci, Linan 311300, Peoples R China
来源：
PHYSICAL REVIEW A | 2017年 / 96卷 / 05期
基金：
中国国家自然科学基金;
关键词：
EVANESCENT-FIELD; PARAXIAL BEAMS; VECTOR BEAM; LIGHT; ROTATION; PHASE;
D O I：
10.1103/PhysRevA.96.053862
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The conversion of the spin-to-orbital optical angular momentum (AM) of an optical field with hybrid states of polarization (SOP) in the near-field region is studied based on the angular spectrum method. The spin-to-orbital optical AM conversion occurs in the longitudinal component of an optical field with hybrid SOP under a highly nonparaxial circumstance. The longitudinal component exhibits different phases and intensity distributions compared to that of the transverse component and it depends sensitively on the initial SOP. Our study reveals that the density distribution of the converted orbital AM can be spatially manipulated by controlling the initial state of polarization.
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页数：7
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