Transversal reverse transformation of anomalous hollow beams in strongly isotropic nonlocal media  

作　　者：戴志平 杨振军 张书敏 庞兆广 游开明 

机构地区：[1]Department of Physics and Electronic Information Science,Hengyang Normal University [2]Department of Physics and Hebei Advanced Thin Film Laboratory,Hebei Normal University

出　　处：《Chinese Physics B》2014年第7期452-458,共7页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61308016,11374089,and 11347121);the Natural Science Foundationof Hebei Province,China(Grant Nos.A2012205023,F2012205076,and A2012205085);the Natural Science Foundation of Hunan Province,China(GrantNo.13JJ4097);the China Postdoctoral Science Foundation(Grant No.2014M551041);the Research Foundation of Education Bureau of Hebei Province,China(Grant No.ZD20131014);Hebei Normal University Foundation,China(Grant No.L2011B06)

摘　　要：Based on the nonlocal nonlinear Schr6dinger 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 obt.ained. 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 properinput 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.Based on the nonlocal nonlinear Schr6dinger 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 obt.ained. 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 properinput 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.

关 键 词：spatial nonlocality beam propagation transversal reverse transformation 

分 类 号：O437[机械工程—光学工程]