ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Transversal reverse transformation of anomalous hollow beams in strongly isotropic nonlocal media |
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 |
a Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421002, China; b Department of Physics and Hebei Advanced Thin Film Laboratory, Hebei Normal University, Shijiazhuang 050024, China |
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Abstract 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.
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Received: 24 February 2014
Revised: 14 April 2014
Accepted manuscript online:
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PACS:
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42.65.Tg
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(Optical solitons; nonlinear guided waves)
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42.65.Jx
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(Beam trapping, self-focusing and defocusing; self-phase modulation)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61308016, 11374089, and 11347121), the Natural Science Foundation of Hebei Province, China (Grant Nos. A2012205023, F2012205076, and A2012205085), the Natural Science Foundation of Hunan Province, China (Grant No. 13JJ4097), the China Postdoctoral Science Foundation (Grant No. 2014M551041), the Research Foundation of Education Bureau of Hebei Province, China (Grant No. ZD20131014), and Hebei Normal University Foundation, China (Grant No. L2011B06). |
Corresponding Authors:
Yang Zhen-Jun
E-mail: zjyang@vip.163.com
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About author: 42.65.Tg; 42.65.Jx |
Cite this article:
Dai Zhi-Ping (戴志平), Yang Zhen-Jun (杨振军), Zhang Shu-Min (张书敏), Pang Zhao-Guang (庞兆广), You Kai-Ming (游开明) Transversal reverse transformation of anomalous hollow beams in strongly isotropic nonlocal media 2014 Chin. Phys. B 23 074208
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