Author:
Zhang Qian-An ,Wu Feng-Tie ,Zheng Wei-Tao ,
Abstract
When generating a bottle beam by using an axicon-lens system, diffraction factors often cause a bright spot in the center of bottle beam. This central bright spot is unfavorable for the using of bottle beam in constructing hollow optical tweezers system. In the article, we propose a new method of phase modulation, by adding a spiral phase plate (SPP) to optical path to make the bottle beam center have phase singularity,thereby eliminating the bright spot well. Theoretical analysis and numerical stimulation are shown to agree with the experimental results.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
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