Journal
ANNALEN DER PHYSIK
Volume 532, Issue 7, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/andp.202000130
Keywords
autofocus; beam modulation; ring Airy beams; self-acceleration; self-healing
Categories
Funding
- National Natural Science Foundation of China [11775083, 11674107, 11374108, 61875057]
- Natural Science Foundation of Guangdong Province, China [2016A030313439]
- Program of Innovation and Entrepreneurship for Undergraduates, and Special Funds for the Cultivation of Guangdong College Students' Scientific and Technological In-novation, China [pdjh2019a0127, pdjh2020a0149]
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By phase-modulating ring Airy Gaussian beams, ring Airy-like beams propagating along predesigned parabolic trajectories are presented which combine the properties of accelerating beams and abruptly autofocusing beams analytically and numerically for the first time. The enhancement of the quadratic term ratio alpha shortens the autofocus distance and increases the slope of the beams after autofocusing. Interestingly, the main lobe tends to break into pieces as alpha increases and the possible reasons have been discussed. Furthermore, the distribution factor beta and the radius of the primaryr(0)can prominently affect the autofocus distance and the intensity at the focal point but do not change the slope of the beams after the autofocusing. In addition, the self-healing properties are validated to be retainable while RAiG beams via predesigned parabolic trajectories with various alpha.
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