Abstract
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 + |ℓ| for the low coherence cases. This is confirmed by our experimental results. This phenomenon may occur in any partially coherent vortex wave.
| Original language | English |
|---|---|
| Article number | 113053 |
| Journal | New Journal of Physics |
| Volume | 15 |
| DOIs | |
| Publication status | Published - 2013 Nov 1 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
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Effect of the radial and azimuthal mode indices of a partially coherent vortex field upon a spatial correlation singularity. / Yang, Yuanjie; Chen, Mingzhou; Mazilu, Michael; Mourka, Areti; Liu, Yi Dong; Dholakia, Kishan.
In: New Journal of Physics, Vol. 15, 113053, 01.11.2013.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effect of the radial and azimuthal mode indices of a partially coherent vortex field upon a spatial correlation singularity
AU - Yang, Yuanjie
AU - Chen, Mingzhou
AU - Mazilu, Michael
AU - Mourka, Areti
AU - Liu, Yi Dong
AU - Dholakia, Kishan
PY - 2013/11/1
Y1 - 2013/11/1
N2 - 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 + |ℓ| for the low coherence cases. This is confirmed by our experimental results. This phenomenon may occur in any partially coherent vortex wave.
AB - 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 + |ℓ| for the low coherence cases. This is confirmed by our experimental results. This phenomenon may occur in any partially coherent vortex wave.
UR - http://www.scopus.com/inward/record.url?scp=84889656618&partnerID=8YFLogxK
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U2 - 10.1088/1367-2630/15/11/113053
DO - 10.1088/1367-2630/15/11/113053
M3 - Article
AN - SCOPUS:84889656618
VL - 15
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
M1 - 113053
ER -