Effects of a thin (In)GaAs layer on the structural and optical properties of InAsInAlGaAs quantum dots

Jin Soo Kim; Youngsin Yang; Cheul Ro Lee; In Hwan Lee; Yeon Tae Yu; Haeng Keun Ahn; Kyeong Won Seol; Jong Su Kim; Jae Young Leem; Mee Yi Ryu

doi:10.1063/1.2822470

Effects of a thin (In)GaAs layer on the structural and optical properties of InAsInAlGaAs quantum dots

Jin Soo Kim, Youngsin Yang, Cheul Ro Lee, In Hwan Lee, Yeon Tae Yu, Haeng Keun Ahn, Kyeong Won Seol, Jong Su Kim, Jae Young Leem, Mee Yi Ryu

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

5 Citations (Scopus)

Abstract

The introduction of a thin (In)GaAs layer between an InAs quantum dot (QD) layer and an InAlGaAs layer altered the structural and optical properties of self-assembled InAsInAlGaAs QDs grown on InP (001) substrates. The emission peak of the InAs QDs on a thin In0.32 Ga0.68 As layer grown on InAlGaAs was redshifted with increasing thickness of the In0.32 Ga0.68 As layer. However, the photoluminescence (PL) peak of the InAs QDs on a thin GaAs layer grown on InAlGaAs was blueshifted with increasing thickness of the GaAs layer, and the PL yield was also drastically decreased. Although the lattice constants of both In0.32 Ga0.68 As and GaAs are smaller than that of InAlGaAs, which would be expected to have a similar type of strain modulation, the structural and optical properties of the InAs QDs were significantly different because of the different nucleation characteristics of QDs.

Original language	English
Article number	113526
Journal	Journal of Applied Physics
Volume	102
Issue number	11
DOIs	https://doi.org/10.1063/1.2822470
Publication status	Published - 2007
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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Effects of a thin (In)GaAs layer on the structural and optical properties of InAsInAlGaAs quantum dots. / Kim, Jin Soo; Yang, Youngsin; Lee, Cheul Ro; Lee, In Hwan; Yu, Yeon Tae; Ahn, Haeng Keun; Seol, Kyeong Won; Kim, Jong Su; Leem, Jae Young; Ryu, Mee Yi.

In: Journal of Applied Physics, Vol. 102, No. 11, 113526, 2007.

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

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title = "Effects of a thin (In)GaAs layer on the structural and optical properties of InAsInAlGaAs quantum dots",

abstract = "The introduction of a thin (In)GaAs layer between an InAs quantum dot (QD) layer and an InAlGaAs layer altered the structural and optical properties of self-assembled InAsInAlGaAs QDs grown on InP (001) substrates. The emission peak of the InAs QDs on a thin In0.32 Ga0.68 As layer grown on InAlGaAs was redshifted with increasing thickness of the In0.32 Ga0.68 As layer. However, the photoluminescence (PL) peak of the InAs QDs on a thin GaAs layer grown on InAlGaAs was blueshifted with increasing thickness of the GaAs layer, and the PL yield was also drastically decreased. Although the lattice constants of both In0.32 Ga0.68 As and GaAs are smaller than that of InAlGaAs, which would be expected to have a similar type of strain modulation, the structural and optical properties of the InAs QDs were significantly different because of the different nucleation characteristics of QDs.",

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AU - Kim, Jin Soo

AU - Yang, Youngsin

AU - Lee, Cheul Ro

AU - Lee, In Hwan

AU - Yu, Yeon Tae

AU - Ahn, Haeng Keun

AU - Seol, Kyeong Won

AU - Kim, Jong Su

AU - Leem, Jae Young

AU - Ryu, Mee Yi

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