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We numerically investigate the deflection characteristics of incoherent coupled bright and dark photovoltaic spatial soliton pairs in a photovoltaic photorefractive crystal with diffusion effect. The numerical results show that, owing to the incoherent interaction, a bright soliton and a dark soliton in the crystal trap each other and the centers of the two solitons move along the same trajectory. It is found that, the deflection of the bright soliton can be controlled by adjusting the input background intensity of the dark soliton when the input peak intensity of the bright soliton is fixed; and the deflection of the bright soliton is suppressed when the input background intensity of the dark soliton is at a special value, while the bright soliton undergoes a deflection when the input background intensity of the dark soliton deviates from this special value. Also, the deflection of the dark soliton can be controlled by adjusting the input peak intensity of the bright soliton when the input background intensity of the dark soliton is fixed.
[1] ［1］Segev M, Crosignani B, Yariv A, Fischer B 1992 Phys. Rev. Lett. 68 923
[2] ［2］Duree G, Shultz J L, Salamo G, Segev M, Yariv A, Crosignani B, Porto P D, Sharp E, Neurgaonkar R R 1993 Phys. Rev. Lett. 71 533
[3] ［3］Duree G, Morin M, Salamo G, Segev M, Crosignani B, Porto P D, Sharp E, Yariv A 1995 Phys. Rev. Lett. 74 1978
[4] ［4］Zhang Y, Hou C F, Sun X D 2007 Chin. Phys. 16 0159
[5] ［5］Lu K Q, Zhao W, Zhang L, Li K H, Zhang Y Q, Liu X M, Zhang Y P, Xu J J 2008 Opt. Commun. 281 2913
[6] ［6］Ciattoni A, Marini A, Rizza C, DelRe E 2009 Opt. Lett. 34 911
[7] ［7］Segev M, Valley G C, Crosignani B, Porto P D, Yariv A 1994 Phys. Rev. Lett. 73 3211
[8] ［8］Christodoulides D N, Carvalho M I 1995 J. Opt. Soc. Am. B 12 1628
[9] ［9］Chen Z G, Mitchell M, Shih M F, Segev M, Garrett M H, Valley G C 1996 Opt. Lett. 21 629
[10] ］Shih M F, Leach P, Segev M, Garrett M H, Salamo G, Valley G C 1996 Opt. Lett. 21 324
[11] ］She W L, Lee K K, Lee W K 2000 Phys. Rev. Lett. 85 2498
[12] ］She W L, Lee K K, Lee W K 1999 Phys. Rev. Lett. 83 3182
[13] ］She W L, Chan C W, Lee W K 2001 Opt. Lett. 26 1093
[14] ］She W L, Xu C C, Guo B, Lee W K 2006 J. Opt. Soc. Am. B 23 2121
[15] ］Jiang D S, Ouyang S G, She W L 2004 Acta Phys. Sin. 53 3777 （in Chinese）［江德生、欧阳世根、佘卫龙 2004 物理学报 53 3777］
[16] ］Liu J S, Lu K Q 1998 Acta Phys. Sin. 47 1509 （in Chinese）［刘劲松、卢克清 1998 物理学报 47 1509］
[17] ］Liu J S, Lu K Q 1999 J. Opt. Soc. Am. B 16 550
[18] ］Hou C F, Yuan B H, Sun X D, Xu K B 2000 Acta Phys. Sin. 49 1969 （in Chinese）［侯春风、袁保红、孙秀冬、许克彬 2000 物理学报 49 1969］
[19] ］Fazio E, Renzi F, Rinaldi R, Bertolotti M, Chauvet M, Ramadan W, Petris A, Vlad V I 2004 Appl. Phys. Lett. 85 2193
[20] ］Lu K Q, Yang Y L, Zhao W, Zhang M Z, Yang Y, Zhang L, Liu X M, Zhang Y P 2007 Chin. Phys. 16 3423
[21] ］Liu S X, Liu J S, Cai X, Fan T, Zhang G Y 2008 Chin. Phys. B 17 3771
[22] ］Chauvet M, Coda V, Maillotte H, Fazio E, Salamo G 2005 Opt. Lett. 30 1977
[23] ］Pismennaya K, Kashin O, Matusevich V, Kiessling A, Kowarschik R 2008 J. Opt. Soc. Am. B 25 136
[24] ］Carvalho M I, Singh S R, Christodoulides D N 1995 Opt. Commun. 120 311
[25] ］Carvalho M I, Facao M, Christodoulides D N 2007 Phys. Rev. E 76 016602
[26] ］Yan L F, Wang H C, She W L 2006 Acta Phys. Sin. 55 5257 （in Chinese）［颜利芬、王红成、佘卫龙 2006 物理学报 55 5257］
[27] ］Yan L F, Wang H C, Zhang B Z, She W L 2007 Acta Phys. 2 Sin. 56 4627 （in Chinese）［颜利芬、王红成、张冰志、佘卫龙 2007 物理学报 56 4627］
[28] ］Cui H, Zhang B Z, She W L 2008 J. Opt. Soc. Am. B 25 1756
[29] ］Zhang G Y, Liu J S 2006 Opt. Commun. 266 691
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[1] ［1］Segev M, Crosignani B, Yariv A, Fischer B 1992 Phys. Rev. Lett. 68 923
[2] ［2］Duree G, Shultz J L, Salamo G, Segev M, Yariv A, Crosignani B, Porto P D, Sharp E, Neurgaonkar R R 1993 Phys. Rev. Lett. 71 533
[3] ［3］Duree G, Morin M, Salamo G, Segev M, Crosignani B, Porto P D, Sharp E, Yariv A 1995 Phys. Rev. Lett. 74 1978
[4] ［4］Zhang Y, Hou C F, Sun X D 2007 Chin. Phys. 16 0159
[5] ［5］Lu K Q, Zhao W, Zhang L, Li K H, Zhang Y Q, Liu X M, Zhang Y P, Xu J J 2008 Opt. Commun. 281 2913
[6] ［6］Ciattoni A, Marini A, Rizza C, DelRe E 2009 Opt. Lett. 34 911
[7] ［7］Segev M, Valley G C, Crosignani B, Porto P D, Yariv A 1994 Phys. Rev. Lett. 73 3211
[8] ［8］Christodoulides D N, Carvalho M I 1995 J. Opt. Soc. Am. B 12 1628
[9] ［9］Chen Z G, Mitchell M, Shih M F, Segev M, Garrett M H, Valley G C 1996 Opt. Lett. 21 629
[10] ］Shih M F, Leach P, Segev M, Garrett M H, Salamo G, Valley G C 1996 Opt. Lett. 21 324
[11] ］She W L, Lee K K, Lee W K 2000 Phys. Rev. Lett. 85 2498
[12] ］She W L, Lee K K, Lee W K 1999 Phys. Rev. Lett. 83 3182
[13] ］She W L, Chan C W, Lee W K 2001 Opt. Lett. 26 1093
[14] ］She W L, Xu C C, Guo B, Lee W K 2006 J. Opt. Soc. Am. B 23 2121
[15] ］Jiang D S, Ouyang S G, She W L 2004 Acta Phys. Sin. 53 3777 （in Chinese）［江德生、欧阳世根、佘卫龙 2004 物理学报 53 3777］
[16] ］Liu J S, Lu K Q 1998 Acta Phys. Sin. 47 1509 （in Chinese）［刘劲松、卢克清 1998 物理学报 47 1509］
[17] ］Liu J S, Lu K Q 1999 J. Opt. Soc. Am. B 16 550
[18] ］Hou C F, Yuan B H, Sun X D, Xu K B 2000 Acta Phys. Sin. 49 1969 （in Chinese）［侯春风、袁保红、孙秀冬、许克彬 2000 物理学报 49 1969］
[19] ］Fazio E, Renzi F, Rinaldi R, Bertolotti M, Chauvet M, Ramadan W, Petris A, Vlad V I 2004 Appl. Phys. Lett. 85 2193
[20] ］Lu K Q, Yang Y L, Zhao W, Zhang M Z, Yang Y, Zhang L, Liu X M, Zhang Y P 2007 Chin. Phys. 16 3423
[21] ］Liu S X, Liu J S, Cai X, Fan T, Zhang G Y 2008 Chin. Phys. B 17 3771
[22] ］Chauvet M, Coda V, Maillotte H, Fazio E, Salamo G 2005 Opt. Lett. 30 1977
[23] ］Pismennaya K, Kashin O, Matusevich V, Kiessling A, Kowarschik R 2008 J. Opt. Soc. Am. B 25 136
[24] ］Carvalho M I, Singh S R, Christodoulides D N 1995 Opt. Commun. 120 311
[25] ］Carvalho M I, Facao M, Christodoulides D N 2007 Phys. Rev. E 76 016602
[26] ］Yan L F, Wang H C, She W L 2006 Acta Phys. Sin. 55 5257 （in Chinese）［颜利芬、王红成、佘卫龙 2006 物理学报 55 5257］
[27] ］Yan L F, Wang H C, Zhang B Z, She W L 2007 Acta Phys. 2 Sin. 56 4627 （in Chinese）［颜利芬、王红成、张冰志、佘卫龙 2007 物理学报 56 4627］
[28] ］Cui H, Zhang B Z, She W L 2008 J. Opt. Soc. Am. B 25 1756
[29] ］Zhang G Y, Liu J S 2006 Opt. Commun. 266 691
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