High power-efficiency terahertz quantum cascade laser  

作　　者：李媛媛 刘俊岐 刘峰奇 张锦川 翟慎强 卓宁 王利军 刘舒曼 王占国 

机构地区：[1]Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences,and Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices

出　　处：《Chinese Physics B》2016年第8期181-184,共4页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China(Grant Nos.2014CB339803 and 2013CB632801);the Special-funded Program on National Key Scientific Instruments and Equipment Development,China(Grant No.2011YQ13001802-04);the National Natural Science Foundation of China(Grant No.61376051)

摘　　要：We demonstrate continuous-wave（CW） high power-efficiency terahertz quantum cascade laser based on semiinsulating surface-plasmon waveguide with epitaxial-side down（Epi-down） mounting process.The performance of the device is analyzed in detail.The laser emits at a frequency of ~3.27 THz and has a maximum CW operating temperature of ~ 70 K.The peak output powers are 177 mW in pulsed mode and 149 mW in CW mode at 10 K for 130-μm-wide Epi-down mounted lasers.The record wall-plug efficiencies in direct measurement are 2.26% and 2.05% in pulsed and CW mode,respectively.We demonstrate continuous-wave（CW） high power-efficiency terahertz quantum cascade laser based on semiinsulating surface-plasmon waveguide with epitaxial-side down（Epi-down） mounting process.The performance of the device is analyzed in detail.The laser emits at a frequency of ~3.27 THz and has a maximum CW operating temperature of ~ 70 K.The peak output powers are 177 mW in pulsed mode and 149 mW in CW mode at 10 K for 130-μm-wide Epi-down mounted lasers.The record wall-plug efficiencies in direct measurement are 2.26% and 2.05% in pulsed and CW mode,respectively.

关 键 词：terahertz lasers quantum cascade lasers epitaxial-side down mounting 

分 类 号：TN248[电子电信—物理电子学] O451[理学—无线电物理]