Surface plasmon propagation and scattering on structured metal–dielectric interfaces are important tools for field confinement and enhanced atom–field interaction. In this paper, we demonstrate a new type of surface plasmon (SP) lasing that more closely resembles the usual mirror-based laser, in a geometry that comprises a central 50-μm-long flat region between two metal hole arrays that serve as reflecting mirrors. The lasing mode shows features of double-slit interference modulated by the radiation pattern of, and selection rules set by, the scattering of SPs on the 2D hole arrays. Our results also provide information on the group velocity of surface plasmons and their scattering and penetration in hole arrays.

中文翻译：

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具有两个孔阵列作为腔镜的表面等离子体激元激光器

表面等离激元在结构化的金属-介电界面上的传播和散射是限制场和增强原子-场相互作用的重要工具。在本文中，我们演示了一种新型的表面等离激元（SP）激光，其几何结构包括两个金属孔阵列之间的中心50-μm长的平坦区域，该表面可作为反射镜，更类似于常规的基于镜子的激光镜子。激射模式显示了由SP在2D孔阵列上的散射的辐射图和选择规则设定的双缝干涉特征。我们的结果还提供了有关表面等离激元的群速度及其在孔阵列中的散射和穿透的信息。