What question did this study set out to answer?

Derive closed-form mathematical equations to calculate position-dependent mechanical stresses within individual layers of multilayer heteroepitaxial composite systems.

June 1, 1977Journal of Applied Physics

Calculated stresses in multilayered heteroepitaxial structures

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Authors

GOG.H. OlsenPrinceton University MEM. EttenbergInfrared Laboratories (United States)

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Implication

Theoretical modeling reveals stress reversal in aluminum gallium arsenide heterojunction lasers, suggesting mechanisms for extended device operating lifetimes.

Key Points

Derive closed-form mathematical equations to calculate position-dependent mechanical stresses within individual layers of multilayer heteroepitaxial composite systems.
Derived analytical expressions for layer-specific stress assuming isotropic elastic constants, with validation against computational solutions for unequal constants.
Applied the mathematical model to analyze stress profiles across layers in aluminum gallium arsenide/gallium arsenide (AlxGa1−xAs/GaAs) heterojunction lasers.
Adding aluminum to the active gallium arsenide region alters the internal stress profile, changing the active-region stress from tension to compression.
The transition from tensile to compressive stress in the active layer directly correlates with observed improvements in semiconductor laser operating lifetimes.

Cite This Study

Olsen et al. (1977) studied this question.

synapsesocial.com/papers/6a6f3cfa26a7f98052dbf5c9 https://doi.org/10.1063/1.323970

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Implication

Theoretical modeling reveals stress reversal in aluminum gallium arsenide heterojunction lasers, suggesting mechanisms for extended device operating lifetimes.

Calculated stresses in multilayered heteroepitaxial structures

Discussion

Member takes

Implication

Key Points

Cite This Study

Calculated stresses in multilayered heteroepitaxial structures

Discussion

Member takes

Implication

Key Points

Cite This Study

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