摘要
A model of an annular fiat-topped vortex beam based on multi-Gaussian superimposition is proposed. We experimentally produce this beam with a computer-generated hologram （CGH） displayed on a spatial light modulator （SLM）. The power of the beam is concentrated on a single-ring structure and has an extremely strong radial intensity gradient. This beam facilitates various applications ranging from Sisyphus atom cooling to micro-particle trapping.
A model of an annular fiat-topped vortex beam based on multi-Gaussian superimposition is proposed. We experimentally produce this beam with a computer-generated hologram （CGH） displayed on a spatial light modulator （SLM）. The power of the beam is concentrated on a single-ring structure and has an extremely strong radial intensity gradient. This beam facilitates various applications ranging from Sisyphus atom cooling to micro-particle trapping.
基金
supported by the National Natural Science Foundation of China (No.11074105)
the Natural Science Foundation of Shandong Province (No.Z2008A02)
the Ludong University Natural Science Doctorate Program (No.LY20082802)
