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| Solitons in optical lattices with nonlocal nonlinearity |
| Ge Li-Juan, Wang Qi, Shen Ming, Shi Jie-Long, Kong Qian, Hou Peng |
| Department of Physics, Shanghai University, Shanghai
200444, China |
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Abstract The propagation of spatial solitons is systematically investigated
in nonlocal nonlinear media with an imprinted transverse periodic
modulation of the refractive index. Based on the variational
principle and the infinitesimal approximation of Maclaurin series
expansion, we obtain an analytical solution of such nonlocal spatial
solitons and an interesting result that the critical power for such
solitons propagation is smaller than that in uniform nonlocal
self-focusing media. It is found that there exist thresholds in
modulation period and lattice depth for such solitons. A stable
spatial soliton propagation is maintained with proper adjustment of
the modulation period and the lattice depth.
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Received: 07 April 2008
Published: 20 February 2009
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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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42.79.Wc
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(Optical coatings)
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42.65.Hw
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(Phase conjugation; photorefractive and Kerr effects)
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| Fund:Project supported in part by the
National Natural Science Foundation of China (Grant Nos 60677030 and
60808002), the Specialized Research Fund for the Doctoral Program of
Higher Education, China (Grant No 20060280007), the Science and
Technology Commissio |
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| [1] |
Cheng Shuang, Wang Qi, Ge Li-Juan, Shi Jie-Long, Ding Hai-Xia, Shen Ming. Elliptical Gaussian solitons in synthetic nonlocal nonliear media[J]. Chin. Phys. B, 2011, 20(5): 54206-054206. |
| [2] |
Huang Hui-Chang, He Ying-Ji, Wang He-Zhou. Surface superlattice solitons in nonlocal nonlinear media[J]. Chin. Phys. B, 2009, 18(11): 4919-4923. |
| [3] |
Wen Shuang-chun, Fan Dian-yuan. FILAMENTATION INSTABILITY OF LASER BEAMS IN NONLOCAL NONLINEAR MEDIA[J]. Chin. Phys., 2001, 10(11): 1032-1036. |
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2009, Vol. 18 
