High optical property vertically aligned InAs quantum dot structures with GaAsSb overgrown layers

Wei Sheng Liu; Hong Ming Wu; Yu Ann Liao; Jen Inn Chyi; Wen Yen Chen; Tzu Min Hsu

doi:10.1016/j.jcrysgro.2010.10.136

High optical property vertically aligned InAs quantum dot structures with GaAsSb overgrown layers

Wei Sheng Liu
, Hong Ming Wu
, Yu Ann Liao
, Jen Inn Chyi
, Wen Yen Chen
, Tzu Min Hsu

電機工程學系

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

19 引文斯高帕斯（Scopus）

摘要

This study investigates the feasibility of growing high quality columnar InAs/GaAsSb quantum dots (QDs) on a GaAs (1 0 0) substrate using a molecular beam epitaxial system. Structural and photoluminescence (PL) studies are conducted on vertically aligned, ten-period InAs quantum dot (QD) stacks with two different overgrown layer designs. Experimental results indicate an increased dot density of 5×10¹⁰ cm^-2 with completely suppressed coalescences in vertically aligned InAs quantum dots capped by a GaAsSb layer. This finding demonstrates a columnar dot structure with an enhanced luminescent intensity, activation energy, and narrow spectral line width of 22 meV.

原文	???core.languages.en_GB???
頁（從 - 到）	164-166
頁數	3
期刊	Journal of Crystal Growth
卷	323
發行號	1
DOIs	https://doi.org/10.1016/j.jcrysgro.2010.10.136
出版狀態	已出版 - 15 5月 2011

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10.1016/j.jcrysgro.2010.10.136

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title = "High optical property vertically aligned InAs quantum dot structures with GaAsSb overgrown layers",

abstract = "This study investigates the feasibility of growing high quality columnar InAs/GaAsSb quantum dots (QDs) on a GaAs (1 0 0) substrate using a molecular beam epitaxial system. Structural and photoluminescence (PL) studies are conducted on vertically aligned, ten-period InAs quantum dot (QD) stacks with two different overgrown layer designs. Experimental results indicate an increased dot density of 5×1010 cm-2 with completely suppressed coalescences in vertically aligned InAs quantum dots capped by a GaAsSb layer. This finding demonstrates a columnar dot structure with an enhanced luminescent intensity, activation energy, and narrow spectral line width of 22 meV.",

keywords = "Molecular beam epitaxy, Nanostructures, Semiconducting IIIV materials, Semiconducting indium compound",

author = "Liu, \{Wei Sheng\} and Wu, \{Hong Ming\} and Liao, \{Yu Ann\} and Chyi, \{Jen Inn\} and Chen, \{Wen Yen\} and Hsu, \{Tzu Min\}",

note = "Funding Information: This work was supported in part by the National Science Council of Taiwan of ROC under Contract no. NSC 98-2218-E-155-010 .",

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T1 - High optical property vertically aligned InAs quantum dot structures with GaAsSb overgrown layers

AU - Liu, Wei Sheng

AU - Wu, Hong Ming

AU - Liao, Yu Ann

AU - Chyi, Jen Inn

AU - Chen, Wen Yen

AU - Hsu, Tzu Min

N1 - Funding Information: This work was supported in part by the National Science Council of Taiwan of ROC under Contract no. NSC 98-2218-E-155-010 .

PY - 2011/5/15

Y1 - 2011/5/15

N2 - This study investigates the feasibility of growing high quality columnar InAs/GaAsSb quantum dots (QDs) on a GaAs (1 0 0) substrate using a molecular beam epitaxial system. Structural and photoluminescence (PL) studies are conducted on vertically aligned, ten-period InAs quantum dot (QD) stacks with two different overgrown layer designs. Experimental results indicate an increased dot density of 5×1010 cm-2 with completely suppressed coalescences in vertically aligned InAs quantum dots capped by a GaAsSb layer. This finding demonstrates a columnar dot structure with an enhanced luminescent intensity, activation energy, and narrow spectral line width of 22 meV.

AB - This study investigates the feasibility of growing high quality columnar InAs/GaAsSb quantum dots (QDs) on a GaAs (1 0 0) substrate using a molecular beam epitaxial system. Structural and photoluminescence (PL) studies are conducted on vertically aligned, ten-period InAs quantum dot (QD) stacks with two different overgrown layer designs. Experimental results indicate an increased dot density of 5×1010 cm-2 with completely suppressed coalescences in vertically aligned InAs quantum dots capped by a GaAsSb layer. This finding demonstrates a columnar dot structure with an enhanced luminescent intensity, activation energy, and narrow spectral line width of 22 meV.

KW - Molecular beam epitaxy

KW - Nanostructures

KW - Semiconducting IIIV materials

KW - Semiconducting indium compound

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M3 - 期刊論文

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SN - 0022-0248

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EP - 166

JO - Journal of Crystal Growth

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High optical property vertically aligned InAs quantum dot structures with GaAsSb overgrown layers

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