Quantum-confined Stark effect in interdiffused quantum dots

Y. Wang; H. S. Djie; B. S. Ooi

doi:10.1063/1.2358296

Quantum-confined Stark effect in interdiffused quantum dots

Y. Wang^*, H. S. Djie, B. S. Ooi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The authors theoretically investigate the effects of isotropic composition interdiffusion on the optical transition energy of quantum-dot (QD) structures under an electric field. Their three-dimensional QD calculation is based on coupled InAsGaAs QDs arranged periodically in a tetragonal superlattice, taking into account the effects of finite band offset, valence-band mixing, strain, effective mass anisotropicity, and different QD shapes. The electron and hole Hamiltonians with the interdiffusion effect are solved in the momentum space domain. The enhanced Stark shifts and the reduced built-in dipole moment have been found for the interdiffused QD structures.

Original language	English (US)
Article number	151104
Journal	Applied Physics Letters
Volume	89
Issue number	15
DOIs	https://doi.org/10.1063/1.2358296
State	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Quantum-confined Stark effect in interdiffused quantum dots",

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AU - Ooi, B. S.

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AB - The authors theoretically investigate the effects of isotropic composition interdiffusion on the optical transition energy of quantum-dot (QD) structures under an electric field. Their three-dimensional QD calculation is based on coupled InAsGaAs QDs arranged periodically in a tetragonal superlattice, taking into account the effects of finite band offset, valence-band mixing, strain, effective mass anisotropicity, and different QD shapes. The electron and hole Hamiltonians with the interdiffusion effect are solved in the momentum space domain. The enhanced Stark shifts and the reduced built-in dipole moment have been found for the interdiffused QD structures.

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Quantum-confined Stark effect in interdiffused quantum dots

Abstract

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