52 2 2003 2 100023290Π2003Π52 (02) Π0377206 ACTA PHYSICA SINICA Vol 52,No 2,February,2003 ν 2003 Chin Phys Soc 3 2 g (, 510275) (2002 1 12 ;2002 6 26 ), 2,,, : 2,,, PACC: 4265S,4265J 11, 2,,, ;, 2 3 : ] 7 ] 2 [1 [4 [8 11 ] [12 ],,, [13 16 ] [17 22 ] 2, [23 ] [24 ],, 2, [25 ] [19,26 28 ],,, [29 ] [30, ] 2, [31,32],,,,,,,, 2 22 ], 21 [33,34],,,, I s, [35,36 ], I b I s e 2, I b o [17 3 ( :10074082) ( :99197) ( :001192) g 1 1995-2004 Tsinghua Tongfang Optical Disc Co, Ltd All rights reserved
378 52 [37 ] ^J [9 ],, J, E = ^E E, R = ko eff k e eff ( S s I s + + S b I b ) ( N d - N i d) - ^nn i d = 0, (1) ^J = [ q ^n^e + ( S s k e eff I s + S b k o eff I b ) ( N d - N i d) c ] = 0, (2) ^E + q ( ^n + N A - N i d) = 0, (3) s V = - lπ2 J = ne + (1 - N) ( u 2 + R) = conts, (2) d x ^E1 (4) - lπ2, k e eff k o d E = 0, (4) eff - lπ2l s Glass ; I s, I b ; 9 2 u ( ) S s, S b ; ^n 9 2 = ( + E) u ( b ) (6) ; N d ; N i d (6) n,,n ; N A ;,, (4) C = q V (1) L s ; ; ^J ; c [8 ; ; s N d µ N ] A n u2 + 1 rn (2) ; - q ; ^E ; V ( 1 rn = Ni d 1, N ν 1 N A (a) ) ; l J = (1 + u 2 ) E + ( u 2 + R),, J u 2 + R E =, 1 + u 2-1 (8) 1 + u 2 c R Glass Glass,c x, ^E = [9] 9 ^E S 9 b I b [9], x (1) + S b I b = S b (ΠS b + I b ) S b I b n ν N i d, N d, N A J = - CD + ldπl s - 1 + R (8) s q 9 ^E ν 1 [9 ],(3) 9 x N A N i d, (5) E = - CD + ldπl s - 1 - u 2 1 (9) 1 + u 2 [5,8 ] 9 9 z - i 2 k [5,8] 9 2 i kn 2 A ( x, z) = A ( x, z), (6) 9 x n b A ( x) = u ( x) I b S b exp (i z) (7) S s n = ^n, N = Ni d, r = an d N d N d, a = S b I b,= ke eff S b I b, E= N A N A a q, J= an d, J =,= x L s,l s = 1 ( 2 kb) 1Π2, b = ( k ) n3 b r eff n b 2q,, I b ϖ0,, a S b I b (1), (2), (4), (6) n = ( u 2 + 1) (1 - N)Π( rn), (1) C + lπ2l s (8) (4), D = 1Π lπ2l s 1 - lπ2l s 1 + u 2 d, (9), R,, 2 A ( x, z), n b, 1,n = - 2 n3 b r eff ^E, A ( x, z), 2 [17 22 ] 1995-2004 Tsinghua Tongfang Optical Disc Co, Ltd All rights reserved 2, (2), ( k o eff S b I b ( N d - N i d ) ) gr E
2 : 2 379 1 (a), V ; (b),e [38 ], 330mWΠcm 2 ( 1 (b) ) 215nAΠcm 2, [38 ](511) ( ),, J ph I,, 330mWΠcm 2 10WΠcm 2, J ph 10-6 A cm 2 S = 0136cm 2, V = 5000V, gr =, 10 12, BDΠCD 70 S b Π= 10 9 cm - 1 s + lπ2 - lπ2, ^E d x LiNbO 3 0101cm 2 ΠVs [8 ], BaTiO 3 015cm 2 Π + V + ^JSgR = 0 S Vs [39], KNSBN BaTiO 3, gr, + lπ2l s E d+ C + JB = 0, (10) [39 ], BaTiO - lπ2l 3 s, B = SgRJ Π( E L s ) (10) (8) = 011cm 2 V - 1 s - 1 BD10 4, E = - Y + u 2 1 + u 2, (11) [36 ], R > 1, R Y = ( - ldπl s + 1 + CD + RBD)Π(1 + BD), (12) ; R < 1, R D = 1Π + lπ2l s 1 - lπ2l s 1 + u 2 d [35 ] [36 ], Y R < 1 R > 1, [36 ](5) R, R = 112, ( 2, Y a) ; R = 015, ( 2 b) < 1, Y ; gr V ( V Y > 1, Y gr 10 10,) BDΠCD1, Y( CDΠBD + (12) Y R, Y R,R Glass R V, R Y Y, Glass Y > 1 Y < 1 BDΠCD ν 1, Glass 1995-2004 Tsinghua Tongfang Optical Disc Co, Ltd All rights reserved l, D L s l Y( CD + RBD)Π(1 + BD), BDS b I b qn d SgRΠ(N A l), CDq VΠ( k e effn A l) KNSBN, CD BD BDΠCD = S b I b k e eff N d SgRΠV, S b I b k e [38,39 ] eff N d J ph,, I b = 10WΠcm 2 J - 1[40 ], N d ΠN A = 100 [40 ], SΠl = 0 6cm 10-1 10-2 cm 2 ΠVs KNSBN, YR, [36 ], R R) R 1,
380 52 2, 2 ( a) ( b) ( I b = 10WΠcm 2, S = 0 36cm 2, V = 5000V, gr = 10 12, S b Π= 10 9 cm - 1 s J - 1, N d ΠN A = 100, SΠl = 016cm,= 011cm 2 V - 1 s - 1, R = 112, u ( ) = 1 ( ),R = 015, u (0) = 1 ( ), YR) 31 I b ϖ0, S b I b, R D L s l (11) E = -,,, ( ) CD + u 2 1 + u 2 (13) ( ), [18 ](12),, [18 ], (11) E = - CDΠ(1 + BD) + u 2 1 + u 2 1 (14), CDΠ(1 + BD) > 1 ; CDΠ(1 + BD) < 1 [22 ], 2,,V =, 0, gr = (11) E = - R + u 2 1 + u 2 1 (15) [36 ],, ((2) ), [35,36 ],,,, 2,,,,,, 41,,, 1995-2004 Tsinghua Tongfang Optical Disc Co, Ltd All rights reserved
2 : 2 381 [1] Duree G C Jr, Shultz J L, Salamo GJ, Segev M, Yariv A, Crosig2 nani B, Porto P D, Sharp E J and Neurgaonker R R 1993 Phys Rev Lett 71 533 [2] Segev M, Crosignani B, Yariv A and Fischer B 1992 Phys Rev lett 68 923 Maufoy J, Fressengeas N, Wolfersberger D and Kugel G1999 Phys Rev E 59 6116 [3] Duree G, Morin M, Salama G, Segev M, Crosinani B, Porto P D, Sharp E and Yariv A 1995 Phys Rev Lett 74 1978 [4] Castillo M D I, Aguilar P A M, Sanchez2Mondragon J J, Stepanov S and Vysloukh V 1994 Appl Phys Lett 64 408 Shih M, Leach P, Segev M, Garrett M H, Salamo G and Valley G C 1996 Opt Lett 21 324 [5] Segev M, Valley G C, Crosignani B, Porto P D and Yariv A 1994 Phys Rev Lett 73 3211 [6] Segev M, Shih M and Valley G C 1996 J Opt Soc Am B 13 706 Christodoulides D N and Carvalho M I 1995 J Opt Soc Am B 12 1628 [7] Kos K, Meng H, Salamo G, Shih M, Segev M and Valley G C 1996 Phys Rev E 53 R4330 Ryf R, Wiki M, Montemezzani G, Guter P and Zozulya A A 1999 Opt Commum 159 339 [8] Segev M, Valley G C, Bashaw M C, Taya M and Fejer M M 1997 J Opt Soc Am B 14 1772 Ling Z F, Guo R, Liu S M and Zhang G Y 2000 Acta Phys Sin 49 455 (in Chinese) [ 2000 [31] Shih M F and Sheu F W 1999 Opt Lett 24 1853 49 455 ] [9] Valley G C, Segev M, Crosignani B, Yariv A, Fejer M M and Bashaw M C 1994 Phys Rev A 50 R4457 [10] Taya M, Bashaw M C, Fejer M M, Segev M and Valley G C 1995 Phys Rev A 52 3095 Chen Z, Segev M, Wilson D W, Muller R E and Maker P D 1997 Phys Rev Lett 78 2948 [11] She W L, Lee K K and Lee W K 1999 Phys Rev Lett 83 3182 [12] Mitchell M, Segev M 1997 Nature 387 880 [13] Christodoulides D N, Coskun T H et al 1997 Phys Rev Lett 78 646 Christodoulides D N, Coskun T H et al 1998 Phys Rev Lett 80 5113 [14] Mitchell M, Chen Z, Shih M and Segev M 1996 Phys Rev Lett 77 490 [15] Wang X S, She WL 2002 Acta Phys Sin 51 573(in Chinese) [ 2002 51 573] [16] Chen Z, Mithell M, Segev M, Coskun T H and Christodoulides D N 1998 Science 280 889 [17] Liu J S et al 1998 Acta Phys Sin 47 1509 (in Chinese) [ 1998 47 1509] [18] Lu KQ, Tang T T 1999 Acta Phys Sin 48 2070(in Chinee) [ 1999 48 2070 ] [19] Hou C F et al 2000 Acta Phys Sin 49 1969 (in Chinese) [ 2000 49 1969 ] [20] Liu J S et al 2000 Chin Phys 9 667 [21] Liu J S et al 2001 Acta Phys Sin 50 880 (in Chinese) [ 2001 50 880] [22] Liu J S 2001 Chin Phys 10 1037 Liu J S, Hao Z H 2002 Chin Phys 11 254 [23] She W L, Lee K K, Lee W K 2000 Phys Rev Lett 85 2498 [24] She W L et al 2001 Acta Phys Sin 50 886 (in Chinese) [ 2001 50 886] [25] Wang X S et al 2001 Acta Phys Sin 50 496 (in Chinese) [ 2001 50 496 ] [26] Christodoulides D N, Singh S R et al 1996 Appl Phys Lett 68 1763 [27] Chen Z, Segev M et al 1996 Opt Lett 21 1436 [28] Chen Z, Segev M et al 1996 Opt Lett 21 1821 [29] Stegeman A and Segev M 1999 Science 286 1518 [30] Delre E, Tamburrini M et al 1999 Phys Rev Lett 83 1954 [32] Hou C F et al 2001 Acta Phys Sin 50 2159 (in Chinese) [ 2001 50 2159] Hao Z H et al 2002 Acta Phys Sin 51 818 (in Chinese) [ 2002 51 818] [33] Anastassiou C et al 1998 Opt Lett 23 924 [34] Bian S, Frejlich J and Ringhofer K H 1997 Phys Rev Lett 78 4035 [35] She W L, Chan C W and Lee W K 2001 Opt Lett 26 1093 [36] She W L, Wang X S et al 2001 Acta Phys Sin 50 2167 (in Chi2 nese) [ 2001 50 2167] [37] Kukhtarev N V 1979 Ferroelectrics 22 949 [38] Zhang Y L 1997 Ph D Thesis ( Guangzhou : Zhongshan Univrsity) [ 1997 ( : ) ] [39] Valley G C and Klein M B 1983 Optical Engineering 22 704 [40] Li Y, Hou F, Zhou G, Xu K and Hong J 1996 Chinese Journal of Lasers B 5 561 1995-2004 Tsinghua Tongfang Optical Disc Co, Ltd All rights reserved
382 52 Screening2p hotovoltaic solito ns affected by the p hotovoltaic effect of a background beam 3 Wang Xiao2Sheng Ouyang Shi2Gen She Wei2Long g ( State Kdy Laboratory of Optoelectronic Materials and Technologies, Zhongshan University, Guangzhou 510275, China) (Received 12 January 2002 ; revised manuscript received 26 June 2002) Abstract The photovoltaic effect of a background beam do not affect the spatial2charge field in a photovoltaic crystal with a constant external applied field, but has an effect on the current density in the crystal If the crystal is connected with an external circuit which includes a resistor and a constant voltage source, the photovoltaic effect of the background beam will affect the full width at half maximum of the solitons, even switch the bright solitons, to the dark solitons, or vice versa Keywords : screening2photovoltaic solitons, spatial solitons, bright, dark solitons switching PACC: 4265S, 4265J 3 Project supported by the National Natural Science Foundation of China ( Grant No 10074082),the Science Foundation from Ministry of Education, China ( Grant No 99197), and the Natural Science Foundation of Guangdong Province, China ( Grant No 001192) g Corresponding author 1995-2004 Tsinghua Tongfang Optical Disc Co, Ltd All rights reserved