ROOM-TEMPERATURE CONTINUOUS OPERATION OF GAAS/ALGAAS LASERS GROWN ON SI BY ORGANOMETALLIC VAPOR-PHASE EPITAXY

被引:8
作者
CHOI, HK [1 ]
WANG, CA [1 ]
FAN, JCC [1 ]
机构
[1] KOPIN CORP,TAUNTON,MA 02780
关键词
D O I
10.1063/1.346583
中图分类号
O59 [应用物理学];
学科分类号
摘要
Graded-index separate-confinement heterostructure single-quantum-well GaAs/AlGaAs diode lasers exhibiting continuous (cw) operation at room temperature have been grown on a Si substrate by organometallic vapor-phase epitaxy, without the use of molecular-beam epitaxy. To improve the quality of the laser structure, a defect-filtering layer was incorporated between this structure and a GaAs buffer layer about 1.5 μm thick grown on the substrate. Of four types of defect-filtering layers investigated, the most effective was one grown with thermal cycling, which made it possible to obtain pulsed threshold current densities as low as 350 A/cm2 for broad-stripe lasers with a cavity length of 500 μm. Ridge-waveguide lasers with this type of defect-filtering layer have exhibited cw threshold currents as low as 25 mA and a differential quantum efficiency of 55%.
引用
收藏
页码:1916 / 1918
页数:3
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