A low-threshold nanolaser based on hybrid plasmonic waveguides at the deep subwavelength scale*
Li Zhi-Quan†, Piao Rui-Qi, Zhao Jing-Jing, Meng Xiao-Yun, Tong Kai
       
The modal properties of the fundamental hybrid plasmonic mode with different w for the cases of nanowire radii r 1 = r 2 = 30 nm, 40 nm, 50 nm, 60 nm, 70 nm ( h = 15 nm, d = 20 nm, r 3 = 2 r 1 + w /2 + d ): (a) modal effective index n eff, (b) effective propagation loss α eff, (c) normalized mode area A eff/ A 0, (d) confinement factor Γ .