论文标题
非铁耦合激光阵列中的复杂皮肤模式
Complex Skin Modes in Non-Hermitian Coupled Laser Arrays
论文作者
论文摘要
从生物生态系统到自旋眼镜,连通性在确定网络的功能,动力学和弹性方面起着至关重要的作用。在非热物理学领域中,理论上已经证明了振荡器网络之间复杂和不对称交换相互作用(| kappa_ij |不等于| kappa_ji |),从而导致了新型行为,例如除外,皮肤效应,皮肤效应和散装对应。 Hatano和Nelson在1990年代后期的一系列论文中提出的一个典型的晶格是由Hatano和Nelson提出的。尽管最近在综合维度上探讨了这些理论作品的后果,但Hatano-Nelson模型尚未在真实空间中实现。使这些晶格的实施挑战的是,在光学平台中建立所需的不对称交换相互作用的困难。在这项工作中,通过使用具有非热性和非线性的主动光学振荡器,我们在晶格中引入了谐振元素之间的各向异性交换,这使我们能够观察非热门皮肤效应,相位锁定,相位锁定,并在Hatano-Nelson-nelson Laser射击中进行近场光束转向。我们的工作打开了激光器中的新锁定制度,同时阐明了非富勒系统的基本物理学。
From biological ecosystems to spin glasses, connectivity plays a crucial role in determining the function, dynamics, and resiliency of a network. In the realm of non-Hermitian physics, the possibility of complex and asymmetric exchange interactions (|kappa_ij| not equal to |kappa_ji|) between a network of oscillators has been theoretically shown to lead to novel behaviors like delocalization, skin effect, and bulk-boundary correspondence. An archetypical lattice exhibiting the aforementioned properties is that proposed by Hatano and Nelson in a series of papers in late 1990s. While the ramifications of these theoretical works in optics have been recently pursued in synthetic dimensions, the Hatano-Nelson model has yet to be realized in real space. What makes the implementation of these lattices challenging is the difficulty in establishing the required asymmetric exchange interactions in optical platforms. In this work, by using active optical oscillators featuring non-Hermiticity and nonlinearity, we introduce an anisotropic exchange between the resonant elements in a lattice, an aspect that enables us to observe the non-Hermitian skin effect, phase locking, and near-field beam steering in a Hatano-Nelson laser array. Our work opens up new regimes of phase-locking in lasers while shedding light on the fundamental physics of non-Hermitian systems.