Opt Express. 2023 Jan 16;31(2):3364-3378. doi: 10.1364/OE.480742.
Semiconductor nanowire lasers can be subject to modifications of their lasing threshold resulting from a variation of their environment. A promising choice is to use metallic substrates to gain access to low-volume Surface-Plasmon-Polariton (SPP) modes. We introduce a simple, yet quantitatively precise model that can serve to describe mode competition in nanowire lasers on metallic substrates. We show that an aluminum substrate can decrease the lasing threshold for ZnO nanowire lasers while for a silver substrate, the threshold increases compared with a dielectric substrate. Generalizing from these findings, we make predictions describing the interaction between planar metals and semiconductor nanowires, which allow to guide future improvements of highly-integrated laser sources.
半导体纳米线激光器的激光阈值会受到环境变化的影响。一种很有前途的选择是使用金属衬底来获得低体积表面等离子体激元（SPP）模式。我们引入了一个简单但定量精确的模型，可以用来描述金属衬底上纳米线激光器的模式竞争。我们表明，铝衬底可以降低氧化锌纳米线激光器的激光阈值，而对于银衬底，与介质衬底相比，阈值会增加。从这些发现中进行推广，我们做出了描述平面金属和半导体纳米线相互作用的预测，这有助于指导未来高度集成的激光源的改进。
