Influence of the Structure Parameters on the Relaxation of Semipolar InGaN/GaN Multi Quantum Wells
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概要
- 論文の詳細を見る
The influence of semipolar (20\bar{2}1) InGaN/GaN multi quantum well (MQW) structure parameters such as well composition and thickness (d_{\text{w}}), barrier thickness, as well as total number of periods on the structural and optical properties of the MQWs grown on (20\bar{2}1) GaN by metal organic chemical vapor deposition was investigated. At d_{\text{w}} < 3 nm, the MQW stacks were very robust with respect to changes in the barrier thickness or the number of periods in the MQW stack, and 30 period (2.5 nm In<inf>0.25</inf>Ga<inf>0.75</inf>N/8.5 nm GaN) MQWs exhibiting bright luminescence at 465 nm were demonstrated. For all samples with d_{\text{w}}<3 nm in this study, one-dimensional relaxation via misfit dislocations did not lead to any deterioration of the optical properties of the films, and a decrease in the photoluminescence intensity was only observed after the on-set of two-dimensional relaxation via non-basal plane defects.
- 2013-08-25
著者
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FARRELL Robert
Materials Department, and ERATO JST, UCSB Group, University of California
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IZA Michael
Materials and Electrical Engineering Departments, University of California
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Nakamura Shuji
Materials Department University Of Cahfornia
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Speck James
Materials Department and Electrical and Computer Engineering Department, University of California, Santa Barbara, CA 93106, U.S.A.
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Mishra Umesh
Electrical and Computer Engineering Department, University of California, Santa Barbara, CA 93106, U.S.A.
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Mishra Umesh
Electrical & Computer Engineering and Materials Departments, University of California Santa Barbara, CA 93106, U.S.A.
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Keller Stacia
Electrical & Computer Engineering and Materials Departments, University of California Santa Barbara, CA 93106, U.S.A.
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DenBaars Steven
Electrical & Computer Engineering and Materials Departments, University of California Santa Barbara, CA 93106, U.S.A.
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Farrell Robert
Materials Department, University of California, Santa Barbara, CA 93106, U.S.A.
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Terao Yutaka
Materials Department, University of California, Santa Barbara, CA 93106, U.S.A.
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Young Nathan
Materials Department, University of California, Santa Barbara, CA 93106, U.S.A.
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Speck James
Materials and Electrical Engineering Departments, University of California, Santa Barbara, CA 93106, U.S.A.
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