Discrete and dipole-mode gap solitons in higher-order nonlinear photonic lattices
Discrete and dipole-mode gap solitons in higher-order nonlinear photonic lattices
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DOI：
10.1007/s00340-007-2871-8
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发表时间：
2007-12
期刊：
影响因子：
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通讯作者：
P. Rose;T. Richter;B. Terhalle;J. Imbrock;F. Kaiser;C. Denz
中科院分区：
文献类型：
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作者：
P. Rose;T. Richter;B. Terhalle;J. Imbrock;F. Kaiser;C. Denz
研究了光折变非线性介质中三角形光子晶格中基本离散孤子和偶极子模间隙孤子的形成。这些晶格受到光折射率各向异性的强烈影响，导致对称性降低的取向相关折射率结构。证明了晶格波的两种不同方向可以在全内反射间隙中形成基本离散孤子。此外，还证明了在布拉格反射间隙中，一个晶格取向额外地支持偶极子模式孤子。采用全各向异性模型的数值模拟验证了实验结果。
We investigate the formation of fundamental discrete solitons and dipole-mode gap solitons in triangular photonic lattices imprinted in photorefractive nonlinear media. These lattices are strongly affected by the photorefractive anisotropy, resulting in orientation-dependent refractive index structures with reduced symmetry. It is demonstrated that two different orientations of the lattice wave enable the formation of fundamental discrete solitons in the total internal reflection gap. Furthermore, it is shown that one lattice orientation additionally supports dipole-mode solitons in the Bragg reflection gap. The experimental results are corroborated by numerical simulations using the full anisotropic model.