Abstract This paper predicts that grey spatial solitons can exist in two-photon photorefractive materials. In steady state and under appropriate external bias conditions, it obtains the grey spatial soliton solutions of the optical wave evolution equation. The intensity profile, phase distribution，and transverse velocity of these grey solitons are discussed.
Received: 03 May 2006
Revised: 05 July 2006
Accepted manuscript online:
(Other nonlinear optical materials; photorefractive and semiconductor materials)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 60508005), and Scientific
Research Foundation of Harbin Institute of Technology of China (Grant No HIT. 2003. 31).
Cite this article:
Zhang Yu(张宇), Hou Chun-Feng(侯春风), and Sun Xiu-Dong(孙秀冬) Grey spatial solitons due to two-photon photorefractive effect 2007 Chinese Physics 16 159
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