Exciton localization in vertically and laterally coupled GaN/AlN quantum dots

A. Neogi; H. Morkoç; T. Kuroda; A. Tackeuchi; T. Kawazoe; M. Ohtsu

doi:10.1021/nl048511x

Exciton localization in vertically and laterally coupled GaN/AlN quantum dots

A. Neogi^*, H. Morkoç, T. Kuroda, A. Tackeuchi, T. Kawazoe, M. Ohtsu

^*この研究の対応する著者

先進理工学部

研究成果: Article › 査読

18 被引用数 (Scopus)

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Near-field and time-resolved photoluminescence measurements show evidence of exciton localization in vertically and laterally coupled GaN quantum dots (QDs). The binding energies in multiple period QDs (MQDs) are observed to be stronger by more than six times compared to single period QDs (SQDs). Excitons in MQDs have a short (450 ps) lifetime and persist at room temperature, while SQDs exhibit extraordinarily long (>5 ns) lifetime at 10 K due to reduced spatial overlap of electron and hole wave functions in strained QDs.

本文言語	English
ページ（範囲）	213-217
ページ数	5
ジャーナル	Nano Letters
巻	5
号	2
DOI	https://doi.org/10.1021/nl048511x
出版ステータス	Published - 2005 2月 1

ASJC Scopus subject areas

バイオエンジニアリング
化学 (全般)
材料科学（全般）
凝縮系物理学
機械工学

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10.1021/nl048511x

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T1 - Exciton localization in vertically and laterally coupled GaN/AlN quantum dots

AU - Neogi, A.

AU - Morkoç, H.

AU - Kuroda, T.

AU - Tackeuchi, A.

AU - Kawazoe, T.

AU - Ohtsu, M.

PY - 2005/2/1

Y1 - 2005/2/1

N2 - Near-field and time-resolved photoluminescence measurements show evidence of exciton localization in vertically and laterally coupled GaN quantum dots (QDs). The binding energies in multiple period QDs (MQDs) are observed to be stronger by more than six times compared to single period QDs (SQDs). Excitons in MQDs have a short (450 ps) lifetime and persist at room temperature, while SQDs exhibit extraordinarily long (>5 ns) lifetime at 10 K due to reduced spatial overlap of electron and hole wave functions in strained QDs.

AB - Near-field and time-resolved photoluminescence measurements show evidence of exciton localization in vertically and laterally coupled GaN quantum dots (QDs). The binding energies in multiple period QDs (MQDs) are observed to be stronger by more than six times compared to single period QDs (SQDs). Excitons in MQDs have a short (450 ps) lifetime and persist at room temperature, while SQDs exhibit extraordinarily long (>5 ns) lifetime at 10 K due to reduced spatial overlap of electron and hole wave functions in strained QDs.

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JO - Nano Letters

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Exciton localization in vertically and laterally coupled GaN/AlN quantum dots

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ASJC Scopus subject areas

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