Single-mode surface-emitting distributed feedback quantum-cascade lasers based on hybrid waveguide structure  

作　　者：郭万红 刘俊岐 陈剑燕 李路 王利军 刘峰奇 王占国 

机构地区：[1]Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2011年第6期70-72,共3页中国光学快报（英文版）

基　　金：supported by the National Science Fund for Distinguished Young Scholars of China (No.60525406);the National Natural Science Foundation of China (Nos. 60736031, 60806018, and 60906026);the National Basic Research Program of China (No.2006CB604903);the National High Technology Research and Development Program of China (Nos.2007AA03Z446 and 2009AA03Z403)

摘　　要：Surface-emitting distributed feedback quantum-cascade lasers operating at λ≈7.8 μm are demonstrated. The metal-covered second-order grating is shallow-etched into the surface of a thin InGaAs contact and cladding layer. This forms a hybrid waveguide and used to achieve relatively low waveguide losses and high coupling strengths. The devices exhibit stable single-mode operation from 90 to 130 K with a side mode suppression ratio above 20 dB. A slope efficiency of 194 mW/A is obtained at 90 K, which is twice higher than that of the Fabry-Perot counterpart.Surface-emitting distributed feedback quantum-cascade lasers operating at λ≈7.8 μm are demonstrated. The metal-covered second-order grating is shallow-etched into the surface of a thin InGaAs contact and cladding layer. This forms a hybrid waveguide and used to achieve relatively low waveguide losses and high coupling strengths. The devices exhibit stable single-mode operation from 90 to 130 K with a side mode suppression ratio above 20 dB. A slope efficiency of 194 mW/A is obtained at 90 K, which is twice higher than that of the Fabry-Perot counterpart.

关 键 词：MODE INGAAS DFB 

分 类 号：TN248[电子电信—物理电子学] TN252