High power-efficiency terahertz quantum cascade laser
Li Yuan-Yuan, Liu Jun-Qi†, 
, Liu Feng-Qi‡, , Zhang Jin-Chuan, Zhai Shen-Qiang, Zhuo Ning, Wang Li-Jun, Liu Shu-Man, Wang Zhan-Guo
, Liu Feng-Qi‡, , Zhang Jin-Chuan, Zhai Shen-Qiang, Zhuo Ning, Wang Li-Jun, Liu Shu-Man, Wang Zhan-Guo (a) Scanning electron microscope (SEM) image of an Epi-down mounted device. (b) SEM image of a laser with Au-electroplated layer. (c) Cross section of the device with Epi-down mounting process.
