28 February 2017 The propagation characteristics of circular Airy beam with low-pass filtering modification
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Proceedings Volume 10256, Second International Conference on Photonics and Optical Engineering; 102561L (2017) https://doi.org/10.1117/12.2256958
Event: Second International Conference on Photonics and Optical Engineering, 2016, Xi'an, China
Abstract
The propagation characteristics of the circular Airy beam (CAB) modified with low-pass filtering is investigated in details in this paper. Based on a modification of the angular spectrum of CAB, we get a new kind of CAB constructed with low frequency spectrum, which is called “LCAB” for short. A suitable low-pass filter is introduced to cut off the high frequency angular spectrum and maintain the low frequency domain mainly affecting the front light rings of CAB. Two apodization parameters are employed to optimize the low-pass filtering, which influence the propagation characteristic of the LCAB. Fortunately, the abruptly autofocusing property, the most important property of CAB, is still maintained in LCAB. What is more, the initial ring number and the focal spot length can be controlled by adjusting the two apodization parameters. If the two apodization parameters are appropriately chosen, one can form an elegant optical needle which plays an important role in optical manipulations. The numerical results show that the less front light rings are, the longer the optical needle is. It should be noted that the width of the optical needle will increase as long as the length increases, and lead to the decline of the maximum intensity of the optical needle.
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Guoliang Zheng, Xiangquan Deng, Shixiang Xu, Qingyang Wu, "The propagation characteristics of circular Airy beam with low-pass filtering modification", Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102561L (28 February 2017); doi: 10.1117/12.2256958; https://doi.org/10.1117/12.2256958
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