Assanto Gaetano, Pecciant Marco.Spatial solitons in nematic liquid crystals [J].IEEE J. Quantum Electron,2003,39(1):13-21.[2] Hu W,Zhang T, Guo Q.Nonlocality-controlled interation of spatial solitons in nematic liquid crystals [J].Appl. Phys. Lett.,2006,89(7):071111(1-3).[3] Khoo Iam-Choon.Optically-Induced molecular reorientation in nematic Liquid crystals and nonlinear optical processes in the nanosecond regime [J].IEEE J. Quantum Electron,1987,QE-23(2):267-272.[4] Hsiung H, Shi L P, Shen Y R.Transient laser-induced molecular reorientation and laser heating in a nematic liquid crystal [J].Phys. Rev. A,1984,30(3):1453-1460.[5] Khoo Iam-Choon.Liquid Crystal:Physical Properties and Nonlinear Optical Phenomena [M].New York:John Wiley & Sons, Inc,1995:61-65.[6] Residori S, Bortolozzo U, Huignard J P.Slow and fast light in liquid crystal light valves [J].Phys. Rev. Lett.,2008,100(20)(203603):1-4.[7] Yang Qiguang,Seo Jae Tae, Tabibi Bagher.Slow light and superluminality in kerr media without a pump [J].Phys. Rev. Lett.,2005,95(6):063902(1-4).[8] Conti Claudio,Peccianti Marco, Assanto Gaetano.Route to nonlocality and observation of accessible solitons [J].Phys. Rev. Lett.,2003,91(7):07390(1-4).[9] Deuling H J.Deformation of nematic liquid crystals in an electric field [J].Mol. Cryst. Liq. Cryst.,1972,19(2):123-131.