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
       
(a) Geometry of the proposed plasmonic nanolaser. (b)–(d) Normalized electric field distribution of the fundamental hybrid plasmonic mode of the proposed structure ( r 1 = r 2 = 50 nm, r 3 = 122.5 nm, w = 5 nm, h = 15 nm, d = 20 nm).