论文标题
使用假想仪字段的拓扑散装激光模式
Topological Bulk Lasing Modes Using an Imaginary Gauge Field
论文作者
论文摘要
拓扑边缘模式可抵抗疾病，已用于增强激光的空间稳定性。最近，据透露，拓扑激光器可以使用非热光子光子拓扑拓扑器中的新拓扑阶段进一步稳定。在这里，我们提出了一个程序，通过引入假想仪字段来实现在D维体积上扩展的拓扑保护模式。这将一维Su-Schrieffer-Heeger晶格中零能量扩展模式的概念概括为更高的晶格，从而允许拓扑受保护的D维笨重模式。此外，我们从数值上证明，拓扑散装激光模式可以实现高于拓扑边缘模式激光器的高时间稳定性。在kagome晶格中的示例性拓扑扩展模式中，我们表明其参数空间中存在很大的稳定性区域。
Topological edge modes, which are robust against disorders, have been used to enhance the spatial stability of lasers. Recently, it was revealed that topological lasers can be further stabilized using a novel topological phase in non-Hermitian photonic topological insulators. Here we propose a procedure to realize topologically protected modes extended over a d-dimensional bulk by introducing an imaginary gauge field. This generalizes the idea of zero-energy extended modes in the one-dimensional Su-Schrieffer-Heeger lattice into higher dimensional lattices allowing a d-dimensional bulky mode that is topologically protected. Furthermore, we numerically demonstrate that the topological bulk lasing mode can achieve high temporal stability superior to topological edge mode lasers. In the exemplified topological extended mode in the kagome lattice, we show that large regions of stability exist in its parameter space.
