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Spiral light beams
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DOI：10.1070/PU2004v047n12ABEH001802.png)
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摘要
En 中文
This paper discusses theoretical and experimental results of the investigation of light beams that retain their intensity structure during propagation and focusing. We describe a family of laser beams termed spiral whose intensity remains invariable, up to scale and rotation, during propagation. Several properties of spiral beams are of practical interest for laser technologies, medicine, and microbiology. The problem of synthesis of spiral beams with the intensity distribution given by an arbitrary planar curve is considered. We emphasize the feasibility, in principle, of making lasers that directly generate beams with desired properties without additional unconventional optics.
Keyword:
ORBITAL ANGULAR-MOMENTUM
OPTICAL-VORTEX
PHASE SINGULARITIES
SCREW DISLOCATIONS
LASER-BEAMS
TRANSFORMATION
GENERATION
EVOLUTION
VORTICES
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