A hybrid plasmonic nanolaser based on nanowire/air slot/semicircular graphene and metal wire structure was designed. In this structure, the waveguides in the nanowires and the graphene-metal interface are coupled to form a hybrid plasma mode, which effectively reduces the metal loss. The mode and strong coupling of the laser are analyzed by using the finite-element method. Its electric field distribution, propagation loss, normalized mode area, quality factor, and lasing threshold are studied with the different geometric model. Simulation results reveal that the performance of the laser using this structure can be optimized by adjusting the model parameters. Under the optimal parameters, the effective propagation loss is only 0.0096, and the lasing threshold can be as low as 0.14 μm⁻¹. This structure can achieve deep sub-wavelength confinement and low-loss transmission, and provides technical support for the miniaturization and integration of nano-devices.

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metal wire structure graphenemetal interface lasing threshold miniaturization and integration of nanodevices hybrid plasmonic nanolaser mode and strong coupling normalized mode area quality graphene waveguides effective propagation loss finiteelement lowloss transmission electric field hybrid plasma mode deep subwavelength confinement

Litu Xu,Fang Li,Shuai Liu,Fuqiang Yao,Yahui Liu,.Low Threshold Plasmonic Nanolaser Based on Graphene. 8 (11),.

Litu Xu,Fang Li,Shuai Liu,Fuqiang Yao,Yahui Liu,"Low Threshold Plasmonic Nanolaser Based on Graphene" 8

Litu Xu,Fang Li,Shuai Liu,Fuqiang Yao,Yahui Liu,"Low Threshold Plasmonic Nanolaser Based on Graphene"