Quantum dot lasers based on a stacked and strain-compensated active region grown by metal-organic chemical vapor deposition

被引:45
|
作者
Nuntawong, N [1 ]
Xin, YC [1 ]
Birudavolu, S [1 ]
Wong, PS [1 ]
Huang, S [1 ]
Hains, CP [1 ]
Huffaker, DL [1 ]
机构
[1] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA
关键词
D O I
10.1063/1.1926413
中图分类号
O59 [应用物理学];
学科分类号
摘要
We demonstrate an InAs/ GaAs quantum dot (QD) laser based on a strain-compensated, three- stack active region. Each layer of the stacked QD active region contains a thin GaP (Delta a(o)=- 3.8%) tensile layer embedded in a GaAs matrix to partially compensate the compressive strain of the InAs (Delta a(o)= 7%) QD layer. The optimized GaP thickness is similar to 4 MLs and results in a 36% reduction of compressive strain in our device structure. Atomic force microscope images, room-temperature photoluminescence, and x-ray diffraction confirm that strain compensation improves both structural and optical device properties. Room-temperature ground state lasing at lambda = 1.249 mu m, J(th) = 550 A/cm(2) has been demonstrated. (c) 2005 American Institute of Physics.
引用
收藏
页码:1 / 3
页数:3
相关论文
empty
未找到相关数据