竞争非局域三次五次非线性介质中孤子的传输特性

黄光侨; 林机

doi:10.7498/aps.66.054208

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摘要

研究空间光孤子在一维竞争非局域三次五次非线性介质中的新解和传输特性.发现亮孤子在竞争非局域三次自散焦和五次自聚焦非线性介质中存在不稳定区间.在一般非局域程度下，对于不同的三次非线性效应，同相位复合两孤子间表现为吸引或排斥的相互作用，并讨论了折射率的变化.在竞争非局域三次自聚焦和五次自散焦非线性介质中给出了二极、三极和四极孤子能稳定传播的条件，研究发现更高极孤子的传播是不稳定的.还研究了孤子功率与传播常数以及非局域程度的关系.

关键词:

作者及机构信息

黄光侨,
林机

1.
浙江师范大学物理系, 金华 321004

通信作者: 林机, linji@zjnu.edu.cn

基金项目: 浙江省自然科学基金重点项目（批准号：LZ15A050001）和国家自然科学基金（批准号：11675146）资助的课题.

参考文献

[1]	Conti C, Peccianti M, Assanto G 2003Phys.Rev.Lett. 91 073901
[2]	Conti C, Peccianti M, Assanto G 2004Phys.Rev.Lett. 92 113902
[3]	Fratalocchi A, Assanto G, Brzdakiewicz K A, Karpierz M A 2004Opt.Lett. 29 1530
[4]	Conti C, Peccianti M, Assanto G 2006Opt.Lett. 31 2030
[5]	Dabby F W, Whinnery J R 1968Appl.Phys.Lett. 13 284
[6]	Rotschild C, Cohen O, Manela O, Segev M, Carmon T 2005Phys.Rev.Lett. 95 213904
[7]	Xie Y Q, Guo Q 2004Acta Phys.Sin. 53 3020(in Chinese)[谢逸群, 郭旗2004物理学报53 3020]
[8]	Cao J N, Guo Q 2005Acta Phys.Sin. 54 3688(in Chinese)[曹觉能, 郭旗2005物理学报54 3688]
[9]	Ghofraniha N, Conti C, Ruocco G, Trillo S 2007Phys.Rev.Lett. 99 043903
[10]	Burger S, Bongs K, Dettmer S, Ertmer W, Sengstock K, Sanpera A, Shlyapnikov G V, Lewenstein M 1999Phys.Rev.Lett. 83 5198
[11]	Rasmussen P D, Bang O, Krolikowski W 2005Phys.Rev.E 72 066611
[12]	Nikolov N I, Neshev D, Krolikowski W, Bang O, Rasmussen J J, Christiansen P L 2004Opt.Lett. 29 286
[13]	Esbensen B K, Bache M, Bang O, Krolikowski W 2012Phys.Rev.A 86 033838
[14]	Jia J, Lin J 2012Opt.Express 20 7469
[15]	Snyder A W, Mitchell D J 1997Science 276 1538
[16]	Mihalache D, Mazilu D, Lederer F, Crasovan L C, Kartashov Y V, Torner L, Malomed B A 2006Phys.Rev.E 74 066614
[17]	Doktorov E V, Molchan M A 2008J.Phys.A:Math.Theor. 41 315101
[18]	Tsoy E N 2010Phys.Rev.A 82 063829
[19]	Zhou Z X, Du Y W, Hou C F, Tian H, Wang Y 2011J.Opt.Soc.Am.B 28 1583
[20]	Xu Z Y, Kartashov Y V, Torner L 2005Opt.Lett. 30 3171
[21]	Dong L W, Ye F W 2010Phys.Rev.A 81 013815
[22]	Kartashov Y V, Vysloukh V A, Torner L 2008Opt.Lett. 33 1747
[23]	Du Y W, Zhou Z X, Tian H, Liu D J 2011J.Opt. 13 015201

施引文献

[1]	Conti C, Peccianti M, Assanto G 2003Phys.Rev.Lett. 91 073901
[2]	Conti C, Peccianti M, Assanto G 2004Phys.Rev.Lett. 92 113902
[3]	Fratalocchi A, Assanto G, Brzdakiewicz K A, Karpierz M A 2004Opt.Lett. 29 1530
[4]	Conti C, Peccianti M, Assanto G 2006Opt.Lett. 31 2030
[5]	Dabby F W, Whinnery J R 1968Appl.Phys.Lett. 13 284
[6]	Rotschild C, Cohen O, Manela O, Segev M, Carmon T 2005Phys.Rev.Lett. 95 213904
[7]	Xie Y Q, Guo Q 2004Acta Phys.Sin. 53 3020(in Chinese)[谢逸群, 郭旗2004物理学报53 3020]
[8]	Cao J N, Guo Q 2005Acta Phys.Sin. 54 3688(in Chinese)[曹觉能, 郭旗2005物理学报54 3688]
[9]	Ghofraniha N, Conti C, Ruocco G, Trillo S 2007Phys.Rev.Lett. 99 043903
[10]	Burger S, Bongs K, Dettmer S, Ertmer W, Sengstock K, Sanpera A, Shlyapnikov G V, Lewenstein M 1999Phys.Rev.Lett. 83 5198
[11]	Rasmussen P D, Bang O, Krolikowski W 2005Phys.Rev.E 72 066611
[12]	Nikolov N I, Neshev D, Krolikowski W, Bang O, Rasmussen J J, Christiansen P L 2004Opt.Lett. 29 286
[13]	Esbensen B K, Bache M, Bang O, Krolikowski W 2012Phys.Rev.A 86 033838
[14]	Jia J, Lin J 2012Opt.Express 20 7469
[15]	Snyder A W, Mitchell D J 1997Science 276 1538
[16]	Mihalache D, Mazilu D, Lederer F, Crasovan L C, Kartashov Y V, Torner L, Malomed B A 2006Phys.Rev.E 74 066614
[17]	Doktorov E V, Molchan M A 2008J.Phys.A:Math.Theor. 41 315101
[18]	Tsoy E N 2010Phys.Rev.A 82 063829
[19]	Zhou Z X, Du Y W, Hou C F, Tian H, Wang Y 2011J.Opt.Soc.Am.B 28 1583
[20]	Xu Z Y, Kartashov Y V, Torner L 2005Opt.Lett. 30 3171
[21]	Dong L W, Ye F W 2010Phys.Rev.A 81 013815
[22]	Kartashov Y V, Vysloukh V A, Torner L 2008Opt.Lett. 33 1747
[23]	Du Y W, Zhou Z X, Tian H, Liu D J 2011J.Opt. 13 015201

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竞争非局域三次五次非线性介质中孤子的传输特性

1. 浙江师范大学物理系, 金华 321004

通信作者: 林机, linji@zjnu.edu.cn

基金项目:

浙江省自然科学基金重点项目（批准号：LZ15A050001）和国家自然科学基金（批准号：11675146）资助的课题.

收稿日期: 2016-09-11

修回日期: 2016-12-05

刊出日期: 2017-03-05

摘要: 研究空间光孤子在一维竞争非局域三次五次非线性介质中的新解和传输特性.发现亮孤子在竞争非局域三次自散焦和五次自聚焦非线性介质中存在不稳定区间.在一般非局域程度下，对于不同的三次非线性效应，同相位复合两孤子间表现为吸引或排斥的相互作用，并讨论了折射率的变化.在竞争非局域三次自聚焦和五次自散焦非线性介质中给出了二极、三极和四极孤子能稳定传播的条件，研究发现更高极孤子的传播是不稳定的.还研究了孤子功率与传播常数以及非局域程度的关系.

关键词:

Propagating properties of spatial solitons in the competing nonlocal cubic-quintic nonlinear media

1.
Department of Physics, Zhejiang Normal University, Jinhua 321004, China

Fund Project:

Project supported by the National Natural Science Foundation of Zhejiang Province, China (Grant No. LZ15A050001) and the National Natural Science Foundation of China (Grant No. 11675146).

Received Date: 11 September 2016

Accepted Date: 05 December 2016

Published Online: 05 March 2017

Abstract: We study the new spatial optical solitons and their propagating properties in the one-dimensional nonlocal cubic-quintic (C-Q) nonlinear model by the numerical method. We obtain multi-bright solitons and multipole soliton solutions in the one-dimensional nonlocal C-Q nonlinear model. The propagation of bright solitons is stable in the competing nonlocal cubic self-defocusing and quintic self-focusing nonlinear media when these nonlocal and nonlinear parameters are in the appropriate value domain. Considering the different nonlinear cubic effects, the interaction between two optical solitons with the same phase in the general nonlocal media displays the attraction or the repulsion for different nonlocal and nonlinear parameters. We find that the interval of two solitons affects the interaction between them. The refractive index is changed with the propagating constant when the nonlocal constant d3 is 10. Moreover, the triplepole, quadrupole and pentapole solitons can propagate steadily when the nonlocal parameters are appropriate, but hexa-pole (or above) solitons propagate unsteadily for any nonlocal parameter. Furthermore, we investigate the multi-pole solitons and their propagation stabilities by the Newton difference method and the Fourier split step method, obtain the stable propagation conditions for dipole, triplepole and quadrupole solitons, and find that the propagation of the pentapole and higher-order pole solitons is unstable. We also discuss the interactions of multi-pole solitons when they propagate along the axis z. The interactions are attraction or repulsion when the nonlocal and the nonlinear parameters are different. Meanwhile, we simulate the evolution of the refractive index along the axis z when the spatial optical solitons are multi-pole solitons. Finally, we study the relation between the power of soliton and the propagation constant under different degree of nonlocality. The power of the single bright soliton does not monotonically increase with the increasing propagation constant when the degree of nonlocality d3 is 10. We also derive the relation between the power of dipole bright solitons with the cubic nonlinearity parameter and the propagation constant under different degree of nonlocality. The power decreases monotonically with the increasing propagation constant when the cubic nonlinearity is a certain value or with the increasing cubic nonlinearity when the propagation constant is a certain value.

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