Affiliation:
1. Taiyuan University of Technology
2. Institute of Laser Engineering, Beijing University of Technology
3. Shaanxi University of Science & Technology
Abstract
A GaInAsP/GaAs/GaAsP Al-free laser with asymmetric potential barriers is designed theoretically to prevent carrier leakage. The band alignment demonstrates that a high height of the potential barrier decreases the leakage current. The internal quantum efficiency increases by increasing the injection efficiency, which is attributed to the decreasing electron potential barrier heights. Moreover, the threshold current and operating voltage decrease by adopting a novel barrier so that the output power and power conversion efficiency (PCE) increase. When the injection current is 5 kA/cm2, the PCE is 77.82% and the output power is 13.21 W. The physical mechanism of potential barrier heights affecting carrier transport is investigated, which will provide a theoretical basis for optimizing laser diodes.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Applied Basic Research Project of Shanxi Province, China
Subject
Atomic and Molecular Physics, and Optics
Cited by
4 articles.
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