Two-Dimensional Reconfigurable Non-Hermitian Gauged Laser Array
Two-Dimensional Reconfigurable Non-Hermitian Gauged Laser Array
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DOI：
10.1103/physrevlett.130.263801
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发表时间：
2023-06
影响因子：
8.6
通讯作者：
Zihe Gao;Xingdu Qiao;Mingsen Pan;Shuang Wu;Jieun Yim;Kaiyuan Chen;B. Midya;L. Ge;Liang Feng
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文献类型：
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作者：
Zihe Gao;Xingdu Qiao;Mingsen Pan;Shuang Wu;Jieun Yim;Kaiyuan Chen;B. Midya;L. Ge;Liang Feng
光子非厄米系统中的拓扑效应最近导致了非凡的发现，包括非互易激光，拓扑绝缘体激光器和拓扑超材料，仅举几例。这些效应尽管在非厄米系统中实现，但都源于它们的厄米分量。在这里，我们实验证明拓扑趋肤效应和边界敏感性，诱导的虚规范场在二维激光阵列，这是根本不同的任何厄米拓扑效应和内在的开放系统。通过选择性地和非对称地向系统中注入增益，我们在芯片上合成了一个假想的规范场，该规范场可以根据需要灵活地重新配置。我们不仅证明了非厄米拓扑特征在非线性非平衡系统中保持不变，而且还证明了它们可以被利用来实现强度变形的持续锁相。我们的工作奠定了一个动态可重构的片上相干系统具有强大的可扩展性，有吸引力的任意强度分布的高亮度源的基础。
Topological effects in photonic non-Hermitian systems have recently led to extraordinary discoveries including nonreciprocal lasing, topological insulator lasers, and topological metamaterials, to mention a few. These effects, although realized in non-Hermitian systems, are all stemming from their Hermitian components. Here we experimentally demonstrate the topological skin effect and boundary sensitivity, induced by the imaginary gauge field in a two-dimensional laser array, which are fundamentally different from any Hermitian topological effects and intrinsic to open systems. By selectively and asymmetrically injecting gain into the system, we have synthesized an imaginary gauge field on chip, which can be flexibly reconfigured on demand. We show not only that the non-Hermitian topological features remain intact in a nonlinear nonequilibrium system, but also that they can be harnessed to enable persistent phase locking with intensity morphing. Our work lays the foundation for a dynamically reconfigurable on-chip coherent system with robust scalability, attractive for building high-brightness sources with arbitrary intensity profiles.