数值研究了实部具有缺陷的parity-time(PT)对称光晶格中的缺陷暗孤子.当衍射与自散焦非线性效应平衡时,暗孤子能够被获得;当自散焦介质中的PT对称光晶格实部被附加一个缺陷后,缺陷暗孤子也能够被获得.数值结果显示:缺陷暗孤子可以在很大参数范围内存在并能稳定传播; PT对称光晶格实部附加的缺陷强度有一最大值,超过此值缺陷暗孤子不存在;PT对称光晶格的虚部振幅对缺陷暗孤子的稳定性有影响.
参考文献
| [1] | Bender C M;Boettcher S.Real spectra in non-Hermitian Hamiltonians having PT symmetry[J].Physical Review Letters,199880:5243-5246. |
| [2] | Guo A;Salamo G J;Duchesne D.Observation of PT-symmetry breaking in complex optical potentials[J].Physical Review Letters,2009103:093902. |
| [3] | Rueter C E;Makris K G;El-Ganainy R.Observation of parity-time symmetry in optics[J].Nature Phys,20106:192-195. |
| [4] | Musslimani Z H;Makris K G;El-Ganainy R.Optical solitons in PT periodic potentials[J].Physical Review Letters,2008100:030402. |
| [5] | Makris K G;El-Ganainy R;Christodoulides D N.Beam dynamics in PT-symmetric optical lattices[J].Physical Review Letters,2008100:103904. |
| [6] | Makris K G;El-Ganainy R;Christodoulides D N.PT-symmetric periodic optical potentials[J].International Journal of Theoretical Physics,201150:1019-1041. |
| [7] | Wang H;Wang J.Defect solitons in parity-time periodic potentials[J].Opt Expr,201119:4030-4035. |
| [8] | He Y J;Zhu X;Mihalache D.Lattice solitons in PT-symmetric mixed linear-nonlinear optical lattices[J].Physical Review A,201285:013831. |
| [9] | Zhu X;Wang H;Zheng L X.Gap solitons in parity-time complex periodic optical lattices with the real part of superlattices[J].Optics Letters,201136:2680-2682. |
| [10] | Nixon S;Ge L;Yang J.Stability analysis for solitons in PT-symmetric optical lattices[J].Physical Review A,201285:023822. |
| [11] | Li C Y.Multi-stable solitons in PT-symmetric optical lattices[J].Opt Expr,201220:16823-16831. |
| [12] | Li C Y;Huang C M;Liu H D.Multipeaked gap solitons in PT-symmetric optical lattices[J].Optics Letters,201237:4543-4545. |
| [13] | Zhu X;Wang H;Li H G.Two-dimensional multipeak gap solitons supported by parity-time-symmetric periodic potentials[J].Optics Letters,201338:2723-2725. |
| [14] | Zhu X;Li H G;Wang H.Nonlocal multihump solitons in parity-time symmetric periodic potentials[J].JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS,201330:1987-1995. |
| [15] | Hu S M;Ma X K;Lu D Q.Solitons supported by complex PT-symmetric Gaussian potentials[J].Physical Review A,201285:043826. |
| [16] | Li H G;Jiang X J;Zhu X.Nonlocal solitons in dual-periodic PT-symmetric optical lattices[J].Physical Review A,201286:023840. |
| [17] | Lin Y Y;Jisha C P;Jeng C J.Gap solitons in optical lattices embedded into nonlocal media[J].Physical Review A,201081:063803. |
| [18] | Nixon S;Ge L;Yang J.Stability analysis for soliton in PT-symmetric optical lattices[J].Physical Review A,201285:023822. |
| [19] | Kivshar Y S.Dark solitons in nonlinear optics[J].IEEE Journal of Quantum Electronics,199329:250-264. |
| [20] | Kartashov Y V;Torner L.Gray spatial solitons in nonlocal nonlinear media[J].Optics Letters,200732:946-948. |
| [21] | Louis P J Y;Ostrovskaya E A;Kivshar Y S.Matter-wave dark solitons in optical lattices[J].J Opt B:Quantwh Semiclass Opt,20046:S309. |
| [22] | Johansson M;Kivshar Y S.Discreteness-induced oscillatory instabilities of dark solitons[J].Physical Review Letters,199982:85. |
| [23] | Kivshar Y S;Luther-Davies B B.Dark optical solitons:Physics and applications[J].PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS,1998298:81. |
| [24] | Ablowitz M J;Musslimani Z H.Spectral renormalization method for computing self-localized solutions to nonlinear systems[J].Optics Letters,200530:2140-2142. |
| [25] | Fang L M;Gao J;Shi Z W.Nonlocal defect solitons in parity-time-symmetric superlattices with defocusing nonlinearity[J].European Physical Journal D-Atoms Molecules Clusters & Optical Physics,201468:298. |
| [26] | Wang H;He W;Zheng L X.Defect gap solitons in real linear periodic optical lattices with paritytimesymmetric nonlinear potentials[J].Journal of Physics B:Atomic Molecular and Optical Physics,201245:245401. |
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