Numerical analysis of transition energy shift in InAs/GaAs quantum dots induced by strain-reducing layers

Takaaki Kakitsuka, T. Saito, T. Nakaoka, Y. Arakawa, H. Ebe, M. Sugawara, Y. Yoshikuni

研究成果: Conference article

8 引用 (Scopus)

抄録

The electronic structure of pyramid-like InAs/GaAs quantum dots (QDs) covered with an InGaAs strain-reducing layer is analyzed numerically, focusing on the dependence of the transition energy on the strain-reducing layer thickness. The transition energy of the QD is calculated by the effective mass approximation, taking into account the change of the strain distribution induced by the strain-reducing layer. A large transition energy redshift of more than 60 meV caused by the strain reduction in the QD is obtained, as the strain reducing layer thickness increases. Furthermore, it is found that when strain-reducing layer thickness becomes large, the transition energy redshift saturates. The calculation explains the reported experimental results correctly, which indicates that the strain reducing layer enables control of operation-wavelength over a wide range in various optical devices.

元の言語English
ページ(範囲)1157-1160
ページ数4
ジャーナルPhysica Status Solidi C: Conferences
発行部数4
DOI
出版物ステータスPublished - 2003 12 1
外部発表Yes
イベント2nd International Conference on Semiconductor Quantum Dots, QD 2002 - Tokyo, Japan
継続期間: 2002 9 302002 10 3

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Semiconductor quantum dots
numerical analysis
Numerical analysis
quantum dots
shift
energy
strain distribution
pyramids
gallium arsenide
indium arsenide
Optical devices
electronic structure
Electronic structure
approximation
wavelengths
Wavelength

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

これを引用

Numerical analysis of transition energy shift in InAs/GaAs quantum dots induced by strain-reducing layers. / Kakitsuka, Takaaki; Saito, T.; Nakaoka, T.; Arakawa, Y.; Ebe, H.; Sugawara, M.; Yoshikuni, Y.

:: Physica Status Solidi C: Conferences, 番号 4, 01.12.2003, p. 1157-1160.

研究成果: Conference article

Kakitsuka, T, Saito, T, Nakaoka, T, Arakawa, Y, Ebe, H, Sugawara, M & Yoshikuni, Y 2003, 'Numerical analysis of transition energy shift in InAs/GaAs quantum dots induced by strain-reducing layers', Physica Status Solidi C: Conferences, 番号 4, pp. 1157-1160. https://doi.org/10.1002/pssc.200303026
Kakitsuka, Takaaki ; Saito, T. ; Nakaoka, T. ; Arakawa, Y. ; Ebe, H. ; Sugawara, M. ; Yoshikuni, Y. / Numerical analysis of transition energy shift in InAs/GaAs quantum dots induced by strain-reducing layers. :: Physica Status Solidi C: Conferences. 2003 ; 番号 4. pp. 1157-1160.
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AU - Saito, T.

AU - Nakaoka, T.

AU - Arakawa, Y.

AU - Ebe, H.

AU - Sugawara, M.

AU - Yoshikuni, Y.

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AB - The electronic structure of pyramid-like InAs/GaAs quantum dots (QDs) covered with an InGaAs strain-reducing layer is analyzed numerically, focusing on the dependence of the transition energy on the strain-reducing layer thickness. The transition energy of the QD is calculated by the effective mass approximation, taking into account the change of the strain distribution induced by the strain-reducing layer. A large transition energy redshift of more than 60 meV caused by the strain reduction in the QD is obtained, as the strain reducing layer thickness increases. Furthermore, it is found that when strain-reducing layer thickness becomes large, the transition energy redshift saturates. The calculation explains the reported experimental results correctly, which indicates that the strain reducing layer enables control of operation-wavelength over a wide range in various optical devices.

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