Interaction of two edge dislocations in free-space propagation
Chinese Physics B, ISSN: 1674-1056, Vol: 20, Issue: 1, Page: 014201-1-014201-6
2011
- 12Citations
- 1Captures
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Metrics Details
- Citations12
- Citation Indexes12
- 12
- CrossRef7
- Captures1
- Readers1
Article Description
This paper studies in detail the interaction of two edge dislocations nested in a Gaussian beam propagating in free space. It shows that in free-space propagation the edge dislocations are unstable and vanish, and two noncanonical vortices with opposite topological charge take place when off-axis distances c and c of two edge dislocations are nonzero, and the condition kw + 32cc (w-2cc)z > 0 is fulfilled (k-wave number, w-waist width). A noncanonical vortex appears when one off-axis distance is zero. However, one edge dislocation is stable when two edge dislocations are perpendicular and one off-axis distance is zero. Two perpendicular edge dislocations both with zero off-axis distance are also stable. The analytical results are illustrated by numerical examples. © 2011 Chinese Physical Society and IOP Publishing Ltd.
Bibliographic Details
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