Observation of Local Symmetry in a Photonic System,Laser & Photonics Reviews

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Observation of Local Symmetry in a Photonic System
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2020-03-16 , DOI: 10.1002/lpor.201900222
Nora Schmitt ₁ , Steffen Weimann ₁ , Christian V. Morfonios ₂ , Malte Röntgen ₂ , Matthias Heinrich ₁ , Peter Schmelcher _{2,

3} , Alexander Szameit ₁

Affiliation

The concept of local symmetry has been shown to be a powerful tool in predicting and designing complex transport phenomena in stationary scattering off aperiodic media, in terms of symmetry‐adapted nonlocal currents. For time‐evolving wavepackets, the spatiotemporal correlations caused by local symmetries are more challenging to reveal. A recent formalism‐based nonlocal continuity equation shows how local symmetries are encoded into the dynamics of light propagation in discrete waveguide arrays governed by a Schrödinger equation. However, the experimental demonstration is elusive so far. Representative examples of locally symmetric, globally symmetric, and fully nonsymmetric configurations are fabricated in fs laser‐written photonic arrays and their dynamics are probed. The approach allows to distinguish all three types of structures.

中文翻译：

光子系统中局部对称性的观察

局部对称性的概念已被证明是预测和设计非对称性电流在非周期性介质中平稳散射中预测和设计复杂传输现象的有力工具。对于随时间变化的波包，由局部对称性引起的时空相关性更难以揭示。最近一个基于形式主义的非局部连续性方程显示了如何在Schrödinger方程控制的离散波导阵列中将局部对称性编码为光传播动力学。但是，到目前为止，实验演示还难以捉摸。在fs激光写入的光子阵列中制造了局部对称，全局对称和完全非对称配置的代表性示例，并探讨了它们的动力学特性。该方法可以区分所有三种类型的结构。

更新日期：2020-03-16

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