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Hollow Gaussian beams in strongly nonlocal nonlinear media |
Yang Zhen-Jun(杨振军), Lu Da-Quan(陆大全), Hu Wei(胡巍)†ger, Zheng Yi-Zhou(郑一周), and Gao Xing-Hui(高星辉) |
Laboratory of Photonic Information Technology, South China Normal University, Guangzhou 510631, China |
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Abstract The propagation of hollow Gaussian beams in strongly nonlocal nonlinear media is studied in detail. Two analytical expressions are derived. For hollow Gaussian beams, the intensity distribution always evolves periodically. However the second-order moment beam width can keep invariant during propagation if the input power is equal to the critical power. The interaction of two hollow Gaussian beams and the vortical hollow Gaussian beams are also discussed. The vortical hollow Gaussian beams with an appropriate topological charge can keep their shapes invariant during propagation.
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Received: 04 May 2010
Revised: 02 June 2010
Accepted manuscript online:
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PACS:
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42.30.Kq
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(Fourier optics)
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42.60.Jf
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(Beam characteristics: profile, intensity, and power; spatial pattern formation)
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Fund: Project supported by National Natural Science Foundation of China (Grant Nos. 10804033 and 10674050), Program for Innovative Research Team of Higher Education of Guangdong Province of China (Grant No. 06CXTD005), the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 200805740002), and the Natural Science Foundation of Hebei Province of China (Grant No. F2009000321). |
Cite this article:
Yang Zhen-Jun(杨振军), Lu Da-Quan(陆大全), Hu Wei(胡巍), Zheng Yi-Zhou(郑一周), and Gao Xing-Hui(高星辉) Hollow Gaussian beams in strongly nonlocal nonlinear media 2010 Chin. Phys. B 19 124212
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