Effects of surface states and Si-interlayer based surface passivation on GaAs quantum wires grown by selective molecular beam epitaxy
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概要
- 論文の詳細を見る
Effects of surface states and surface passivation on photoluminescence (PL) properties of GaAs quantum wires (QWRs) are investigated. QWR samples were grown on (001) and (111)B substrates by the selective molecular beam epitaxy (MBE) method. For surface passivation, an ultrathin (about 1 nm) Si interface control layer (Si ICL) was grown by MBE as an interlayer. In both of the selectively grown QWRs on (001) and (111)B substrates, the PL intensity reduced exponentially with reduction of their wire-to-surface distance, being coexistent with a more gradual reduction due to carrier supply reduction. The exponential reduction was explained in terms of interaction between surface states and quantum confined states leading to tunneling assisted nonradiative recombination through surface states. Surface passivation by the Si-ICL method almost completely recovered PL intensities not only for QWRs on the (001) substrate, but also for QWRs on the (111)B substrate.
- American Vacuum Societyの論文
著者
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長谷川 英機
北海道大学量子集積エレクトロニクス研究センター
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Hasegawa Hideki
Department Of Electrical Engineering Faculty Of Engineering Hokkaido University:department Of Electr
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Hasegawa Hideki
Research Center For Interface Quantum Electronics And Faculty Of Engineering Hokkaido University:fac
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Hasegawa H
自治医科大学 臨床検査医学
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Sato T
Hokkaido Univ. Sapporo Jpn
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Sato Taketomo
Graduate School Of Electronics And Information Engineering And Research Center For Integrated Quantu
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Honda Hideyuki
The Faculty Of Medical Science And Welfare Tohoku Bunka Gakuen University
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