›› 2014, Vol. 23 ›› Issue (7): 74208-074208.doi: 10.1088/1674-1056/23/7/074208
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
戴志平a, 杨振军b, 张书敏b, 庞兆广b, 游开明a
Dai Zhi-Ping (戴志平)a, Yang Zhen-Jun (杨振军)b, Zhang Shu-Min (张书敏)b, Pang Zhao-Guang (庞兆广)b, You Kai-Ming (游开明)a
摘要: Based on the nonlocal nonlinear Schrödinger equation, the propagation properties of anomalous hollow beams in strongly isotropic nonlocal media are investigated. The analytical expressions of the beam propagation, the on-axis intensity and the beam width are obtained. The results show that the evolution of the beam is periodical and the input power is the most important parameter. The input power determines the variation of the period. Furthermore, it is found that there exists a critical input power in the x direction and in the y direction separately when the initial beam widths in the two transversal directions are unequal. The beam width remains invariant in the corresponding transversal direction when the input power equals the critical power in one of the transversal directions. Selecting a proper input power, the beam can be broadened or compressed in the two transversal directions at the same time. In particular, the beam can be broadened (compressed) in one transversal direction, whereas in the other transversal direction, it is compressed (broadened), i.e., the transversal reverse transformation.
中图分类号: (Optical solitons; nonlinear guided waves)