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p-type modulation carbon-doping to InGaAs/AlGaAs quantum wells by MOCVD auto-doping for surface-emitting lasers

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5 Author(s)
Hatori, N. ; Precision & Intelligence Lab., Tokyo Inst. of Technol., Yokohama, Japan ; Mizutani, A. ; Nishiyama, N. ; Koyama, F.
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We have proposed a novel structure of p-type modulation doped QWs using a carbon auto doping method, and demonstrated carbon auto doping into AlAs layers by LP-MOCVD. We grew p-type modulation doped InGaAs/AlGaAs QWs, and fabricated edge emitting lasers using the QWs and achieved the reduction of the threshold current density for the first time. We estimated threshold current density (160 A/cm/sup 2/ for 1/spl times/10/sup 19/ cm/sup -3/ modulation doped three QWs edge emitting lasers), and showed the threshold reduction compared with undoped and n-type modulation QW VCSELs. The obtained result shows that the p-type modulation doping could improve the laser performance in terms of reduction of turn-on delay time, resulting in the possibility of future parallel optical transmission systems.

Published in:

Vertical-Cavity Lasers, Technologies for a Global Information Infrastructure, WDM Components Technology, Advanced Semiconductor Lasers and Applications, Gallium Nitride Materials, Processing, and Devi

Date of Conference:

11-13 Aug. 1997

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