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arXiv 2005.06414cond-mat.dis-nnphysics.optics
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保形光束通过非厄米无序晶格的传输

Shape-preserving beam transmission through non-Hermitian disordered lattices

A. F. Tzortzakakis, K. G. Makris, S. Rotter, E. N. Economou

摘要:

研究了高斯光束通过关联非厄米无序光波导晶格的传输特性。在耦合模理论的框架中,我们演示了如何的折射率的虚部需要进行调整,以实现完美的光束传输,尽管存在的障碍。值得注意的是,我们的非厄米特设计可以有效地消除波导中的对角和非对角无序及其耦合的影响。因此,波导阵列提供了一个理想的平台,在离散光子学的背景下,非厄米特现象的实验实现。

英文摘要:

We investigate the propagation of Gaussian beams through optical waveguide lattices characterized by correlated non-Hermitian disorder. In the framework of coupled mode theory, we demonstrate how the imaginary part of the refractive index needs to be adjusted to achieve perfect beam transmission, despite the presence of disorder. Remarkably, the effects of both diagonal and off-diagonal disorder in the waveguides and their couplings can be efficiently eliminated by our non-Hermitian design. Waveguide arrays thus provide an ideal platform for the experimental realization of non-Hermitian phenomena in the context of discrete photonics.

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