Gap vortex solitons in periodic media with quadratic nonlinearity

被引：12

作者：

Hang, Chao ^{[1
]}

Konotop, Vladimir V. ^{[1
,2
]}

Malomed, Boris A. ^{[3
]}

机构：

[1] Univ Lisbon, Ctr Fis Teor & Computac, P-1649003 Lisbon, Portugal

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

[3] Tel Aviv Univ, Fac Engn, Sch Elect Engn, Dept Phys Elect, IL-69978 Tel Aviv, Israel

来源：

PHYSICAL REVIEW A | 2009年 / 80卷 / 02期

关键词：

CUBIC-QUINTIC MODEL; OPTICAL SOLITONS; PHOTONIC LATTICES; SPINNING SOLITONS; WAVE VORTICES; BEAMS; EXCITATION; POTENTIALS; DYNAMICS; COLLAPSE;

D O I：

10.1103/PhysRevA.80.023824

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We explore the existence and stability of two-dimensional spatial gap solitons with embedded vorticity in a bulk medium with the quadratic (chi((2))) nonlinearity and a transverse grating represented by periodic modulation of the refractive index. Gap-vortex solitons (GVSs) can be found in total gaps of the underlying spectra of the fundamental-frequency and second-harmonic waves. We demonstrate the existence of a family of stable GVSs, which are built as four-peak complexes, in the lowest total gap. We also consider dynamical effects, such as self-trapping of GVSs from input beams, and delocalization transitions.

引用

页数：7

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