PT-symmetric coupler with a coupling defect: soliton interaction with exceptional point

被引：26

作者：

Bludov, Yuli V. ^{[1
]}

Hang, Chao ^{[2
,3
]}

Huang, Guoxiang ^{[2
,3
]}

Konotop, Vladimir V. ^{[4
,5
]}

机构：

[1] Univ Minho, Ctr Fis, P-4710057 Braga, Portugal

[2] E China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China

[3] E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China

[4] Univ Lisbon, Fac Ciencias, Ctr Fis Teor & Computac, Inst Invest Interdisciplinar, P-1649003 Lisbon, Portugal

[5] Univ Lisbon, Fac Ciencias, Dept Fis, P-1749016 Lisbon, Portugal

来源：

OPTICS LETTERS | 2014年 / 39卷 / 12期

关键词：

Defects;

D O I：

10.1364/OL.39.003382

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the interaction of a soliton in a parity-time (PT) symmetric coupler which has local perturbation of the coupling constant. This defect does not change the PT-symmetry of the system, but locally can achieve the exceptional point. We found that the symmetric solitons after interaction with the defect either transform into breathers or blow up. The dynamics of antisymmetric solitons are more complex, showing domains of successive broadening of the beam and of the beam splitting in two outward propagating solitons, in addition to the single breather generation and blowup. All the effects are preserved when the coupling strength in the center of the defect deviates from the exceptional point. If the coupling is strong enough, the only observable outcome of the soliton-defect interaction is the generation of the breather. (C) 2014 Optical Society of America

引用

页码：3382 / 3385

页数：4

共 12 条

[1] Zeno effect and switching of solitons in nonlinear couplers [J].