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arXiv 0810.1627nlin.PSnlin.SI
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交错线性-非线性光波导阵列

Interlaced linear-nonlinear optical waveguide arrays

Kyriakos Hizanidis, Yannis Kominis, Nikolaos K. Efremidis

摘要:

耦合离散方程系统描述了一个两个组件的超晶格与交错的线性和非线性成分的基础上重新调查二元波导阵列,如肋AlGaAs结构,除其他外。与单一非线性晶格相比,交错系统表现出额外的带隙控制,适当地选择设计,相对失谐。在更一般的物理设置中,该系统代表了基于单方程的连续模型在横向调制的线性和非线性属性的介质中的离散化方案。连续波的解决方案和相关的调制不稳定性进行了充分的分析研究和数值测试的聚焦和散焦的非线性。在Bloch动量为零的情况下,分析了周期模的传播动力学和稳定性。在带隙的各种稳定的离散孤立波模式,偶极或其他,在相位或交错类型的发现和讨论。

英文摘要:

The system of coupled discrete equations describing a two-component superlattice with interlaced linear and nonlinear constituents is revisited as a basis for investigating binary waveguide arrays, such as ribbed AlGaAs structures, among others. Compared to the single nonlinear lattice, the interlaced system exhibits an extra band-gap controlled by the, suitably chosen by design, relative detuning. In more general physics settings, this system represents a discretization scheme for the single-equation-based continuous models in media with transversely modulated linear and nonlinear properties. Continuous wave solutions and the associated modulational instability are fully analytically investigated and numerically tested for focusing and defocusing nonlinearity. The propagation dynamics and the stability of periodic modes are also analytically investigated for the case of zero Bloch momentum. In the band-gaps a variety of stable discrete solitary modes, dipole or otherwise, in-phase or of staggered type are found and discussed.

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