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液滴エピタキシー法により作製されたGaAs QDs のサイズが与えるフォトルミネッセンスの温度依存性への影響
http://hdl.handle.net/10458/6702
http://hdl.handle.net/10458/6702178f77e8-218a-45b6-999c-13a8469d3b0c
名前 / ファイル | ライセンス | アクション |
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本文 (1.2 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2020-06-21 | |||||
タイトル | ||||||
言語 | ja | |||||
タイトル | 液滴エピタキシー法により作製されたGaAs QDs のサイズが与えるフォトルミネッセンスの温度依存性への影響 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Effect of Dot Size on the Temperature-Dependent Photoluminescence Signal in Droplet-Epitaxy-fabricated GaAs Quantum Dots | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Quantum dots, GaAs, AlGaAs, Droplet epitaxy, Photoluminescence, Blue shift | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
その他(別言語等)のタイトル | ||||||
その他のタイトル | エキテキ エピタキシーホウ ニ ヨリ サクセイ サレタGaAs QDs ノ サイズ ガ アタエル フォトルミネッセンス ノ オンド イゾン セイ ヘノ エイキョウ | |||||
言語 | ja-Kana | |||||
著者 |
江添, 悠平
× 江添, 悠平× 宮内, 雄大× 間野, 高明× 碇, 哲雄× 福山, 敦彦× Ezoe, Yuhei× 宮内, 雄大× 間野, 高明 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We observed an additional blue-shift of photoluminescence (PL) peak energy in the temperature dependence above 150 K in addition to a well-known red-shift in the GaAs Quantum Dots (QDs) grown by a droplet epitaxy method. Although a red-shift has been explained by a steady state model with the QD size distribution, carrier capture, relaxation, and re-trapping, a blue-shift could not be explained. The frequencies of height and diameter of QDs from an atomic force microscopy observation were investigated and calculated transition energies for each QD size. A calculated maximum frequency for GaAs QDs showed a good agreement with the obtained PL spectrum. Therefore, we concluded that the PL spectrum was caused by the ensemble of several size of QDs. The PL spectrum at 4 K could be decomposed into three peaks with a Gaussian function, corresponding to the large-, middle-, and small-size QDs, respectively. Although the integrated PL intensity for middle-size QDs was the largest up to 200 K, it suddenly decreased and those for middle- and small-size QDs became comparable. As a result, the PL energy as the ensemble of QDs moved to the higher energy side. We concluded that this caused the observed additional blue-shift of PL peak. | |||||
言語 | en | |||||
書誌情報 |
ja : 宮崎大学工学部紀要 en : Memoirs of Faculty of Engineering, University of Miyazaki 巻 48, p. 51-54, 発行日 2019-07 |
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出版者 | ||||||
言語 | ja | |||||
出版者 | 宮崎大学工学部 | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | Faculty of Engineering, University of Miyazaki | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 05404924 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00732558 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |