Abstract Plasmonic nanolasers (PNLs) have attracted much attention in recent years due to their light-trapping capabilities beyond the diffraction limit. However, the physics that underpins the lasing action in such devices has not received sufficient treatment in the literature. The contribution of plasmons in PNLs needs to be understood at a granular level for designing enhanced nanoscopic lasers. In this work, we present a modal decomposition-based analysis of a planar PNL that employs a two-dimensional metallic nanohole array interfaced with the gain medium. Using state-of-the-art simulation techniques, we isolate the plasmonic mode that emerges at the metal-gain medium interface interlaced with scattering modes. We present a step-by-step dispersion analysis to identify the possible modes supported by the planar PNL structure and locate the operating point of the PNL. Furthermore, we show how the plasmonic mode regulates the lasing action, and hence, can serve as a tool for laser tunability.

中文翻译：

---

平面多层等离子体纳米激光器的模式分辨分析

摘要 等离子体纳米激光器 (PNL) 由于其超越衍射极限的光捕获能力，近年来备受关注。然而，支持此类设备中激光作用的物理学尚未在文献中得到足够的处理。等离子体激元在 PNL 中的贡献需要在粒度级别上进行理解，以设计增强的纳米级激光器。在这项工作中，我们提出了基于模态分解的平面 PNL 分析，该 PNL 采用与增益介质接口的二维金属纳米孔阵列。使用最先进的模拟技术，我们隔离了在金属增益介质界面出现的与散射模式交错的等离子体模式。我们提出了逐步色散分析，以确定平面 PNL 结构支持的可能模式并定位 PNL 的工作点。此外，我们展示了等离子体模式如何调节激光作用，因此可以作为激光可调性的工具。