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Separation of optical angular momentum flux
Yan, Shaohui; Li, Manman; Yao, Baoli
作者部门瞬态光学技术国家重点实验室
2019-03
发表期刊JOURNAL OF OPTICS
ISSN2040-8978;2040-8986
卷号21期号:3
产权排序1
摘要

We present an approach to separating the angular momentum (AM) flux of monochromatic light into its spin and orbital parts based on a symmetrized AM tensor <(M) over bar >. When considering the AM flux for a light beam through its cross section and that for an outgoing wave through a spherical surface in the far-field zone, the separation gives the desired results: the spin/orbital AM flux equals the integral of spin/orbital AM density times some weighting factor accounting for energy flux. When applied to Bessel beams, the obtained spin and orbital AM fluxes are exactly the same as those given by the paper (2014 New J. Phys. 16 093037) based on the canonical AM tensor separation. Furthermore, from the spin AM flux integral, the divergence-free spin AM tensor <(S) over bar > can be identified. We define the orbital AM tensor to be the difference between the total AM tensor <(M) over bar > and <(S) over bar >. Since <(M) over bar > is divergence-free, the integral for either spin and orbital AM flux, can be made on any closed surface.

关键词angular momentum flux symmetrized AM tensor spin AM tensor
DOI10.1088/2040-8986/ab02d5
收录类别SCI
语种英语
WOS记录号WOS:000459148500001
出版者IOP PUBLISHING LTD
引用统计
文献类型期刊论文
条目标识符http://ir.opt.ac.cn/handle/181661/31174
专题瞬态光学技术国家重点实验室
通讯作者Yan, Shaohui; Yao, Baoli
作者单位Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China
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GB/T 7714
Yan, Shaohui,Li, Manman,Yao, Baoli. Separation of optical angular momentum flux[J]. JOURNAL OF OPTICS,2019,21(3).
APA Yan, Shaohui,Li, Manman,&Yao, Baoli.(2019).Separation of optical angular momentum flux.JOURNAL OF OPTICS,21(3).
MLA Yan, Shaohui,et al."Separation of optical angular momentum flux".JOURNAL OF OPTICS 21.3(2019).
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