Transversal reverse transformation of anomalous hollow beams in strongly isotropic nonlocal media
Transversal reverse transformation of anomalous hollow beams in strongly isotropic nonlocal media
复制标题
强各向同性非局域介质中反常空心梁的横向逆变换
DOI：
10.1088/1674-1056/23/7/074208
复制
发表时间：
2014
影响因子：
1.7
通讯作者：
You Kai-Ming
中科院分区：
文献类型：
--
作者：
Dai Zhi-Ping;Yang Zhen-Jun;Zhang Shu-Min;Pang Zhao-Guang;You Kai-Ming
基于非局域非线性薛定谔方程，研究了反常空心光束在强各向同性非局域介质中的传输特性。得到了光束传输、轴上光强和束宽的解析表达式。结果表明，光束的演化是周期性的，输入功率是影响光束演化的最重要的参数。输入功率决定了周期的变化。此外，还发现当两个横向初始束宽不相等时，x方向和y方向分别存在一个临界输入功率。当输入功率在其中一个横向方向上等于临界功率时，束宽在相应的横向方向上保持不变。选择适当的输入功率，可以同时实现光束在两个横向上的展宽或压缩。特别地，光束可以在一个横向方向上被加宽（压缩），而在另一个横向方向上，它被压缩（加宽），即横向逆变换。
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), ie, the transversal reverse transformation.