Graded barrier single quantum well lasers - Theory and experiment

Optical gain characteristics of quantum well heterostructure lasers are investigated in a broad range from a weakly quantized system to a strongly quantized one utilizing the band-to-band model with k selection rule, the detailed band structure of the quantum well heterostructures, and degenerate st...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 1983-06, Vol.19 (6), p.1025-1030
Main Authors: Kasemset, D., Chi-Shain Hong, Patel, N., Dapkus, P.
Format: Article
Language:English
Subjects:
Carrier confinement
Energy states
Equations
Laser modes
Laser theory
Optical scattering
Quantum mechanics
Quantum well lasers
Statistics
Threshold current
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Summary:Optical gain characteristics of quantum well heterostructure lasers are investigated in a broad range from a weakly quantized system to a strongly quantized one utilizing the band-to-band model with k selection rule, the detailed band structure of the quantum well heterostructures, and degenerate statistics. The results are compared to the experimentally observed threshold current densities in graded barrier single quantum well lasers. It is found that the threshold current densities of these quantum well lasers are well explained by the theoretical results in the range of well width from 75 to 300 Å. The lowest threshold current density observed is 245 A/cm 2 in a heavily doped 100 Å single quantum well laser with a 150μm stripe width and 550μm length.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.1983.1071974