Lateral-current confinement in a GaAs planar stripe-geometry and channeled substrate buried DH laser using reverse-biasedp-njunctions
作者:
W. T. Tsang,
R. A. Logan,
期刊:
Journal of Applied Physics
(AIP Available online 1978)
卷期:
Volume 49,
issue 5
页码: 2629-2638
ISSN:0021-8979
年代: 1978
DOI:10.1063/1.325206
出版商: AIP
数据来源: AIP
摘要:
Processes have been developed for producing stripe-geometry planar DH lasers and channeled substrate buried DH lasers where lateral-current confinement is obtained with reverse-biasedn-pjunctions on both sides of the active layer. These current-confinement schemes lead to current flow only through the two superimposed top and bottom stripe windows in otherwise completely reverse-biasedn-pjunctions. The structures are composed only of as-grown liquid-phase-epitaxy multilayers. These lasers have low threshold current densities, clean stable optical-mode patterns, and excellent linearity in the light-current curves. In addition, the channeled substrate buried DH lasers have optical and carrier confinement in both transverse directions, while also achieving efficient lateral-injection-current confinement. Results from a theoretical analysis, which describes the dependence of the threshold current densityJsthof DH lasers upon stripe widthS, are compared to the measured dependence and excellent agreement is obtained.
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