期刊
NEW JOURNAL OF PHYSICS
卷 15, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/15/11/113053
关键词
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资金
- UK Engineering and Physical Sciences Research Council
- National Natural Science Foundation of China [61205122, 60908034, 61107037]
- Fundamental Research Funds for the Central Universities [ZYGX2010J112]
- Doctoral Fund of Ministry of Education of China [20090185120016]
- Royal Society
The existence of a spatial correlation singularity or a ring dislocation in the spatial coherence function when a vortex is present has been demonstrated recently. Here, we investigate how the spatial correlation singularity is affected by both the radial and azimuthal mode indices (p, l) in a partially coherent light field. Theoretically, we find that the spatial correlation singularity may exist even in a non-vortex beam (l = 0) due to the radial index. Numerical simulations show the number of ring dislocations in the far-field cross correlation function is equal to 2p + vertical bar l vertical bar for the low coherence cases. This is confirmed by our experimental results. This phenomenon may occur in any partially coherent vortex wave.
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