Propagation dynamics of finite-energy Airy beams in nonlocal nonlinear media

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• 作者：Zhen-Kun Wu ; Peng Li ; Yu-Zong Gu
• 关键词：Airy beam ; nonlocal nonlinear ; phase transition ; intensity distribution
• 刊名：Frontiers of Physics
• 出版年：2017
• 出版时间：October 2017
• 年：2017
• 卷：12
• 期：5
• 全文大小：799 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Chinese Library of Science
  
• 出版者：Higher Education Press, co-published with Springer-Verlag GmbH
• ISSN：2095-0470
• 卷排序：12

文摘

We investigate periodic inversion and phase transition of normal and displaced finite-energy Airy beams propagating in nonlocal nonlinear media with the split-step Fourier method. Numerical simulation results show that parameters such as the degree of nonlocality and amplitude have profound effects on the intensity distribution of the period of an Airy beam. Nonlocal nonlinear media will reduce into a harmonic potential if the nonlocality is strong enough, which results in the beam fluctuating in an approximately cosine mode. The beam profile changes from an Airy profile to a Gaussian one at a critical point, and during propagation the process repeats to form an unusual oscillation. We also briefly discus the two-dimensional case, being equivalent to a product of two one-dimensional cases.