Excitonic properties of zinc-blende ZnSe/MgS superlattices studied by reflection spectroscopy
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概要
- 論文の詳細を見る
Excitonic properties of newly developed zinc-blende ZnSe/MgS superlattices (SL’s) were measured byreflection spectroscopy. The modification of the excitonic peaks by the multiple reflection in the SL films wastreated theoretically and a fitting method to estimate the exciton absorption peak positions and exciton linewidthswas developed. Although zinc-blende MgS did not exist before, excellent optical properties wereobserved in the ZnSe/MgS SL’s. Excitonic structures were clearly observed from 13 K up to the measuredroom temperature. In spite of strong ionicity of MgS barrier layers in the ZnSe/MgS SL’s, the reduction ofexciton–LO-phonon coupling was clearly observed in narrower wells. This indicates that the quantum confinementeffect on excitons is large due to the large band offsets and it overcomes the enhancement ofexciton–LO-phonon scattering due to high ionicity in barrier layers.
- The American Physical Societyの論文
著者
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鈴木 久男
静岡大学工学部物質工学科
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SUEMUNE Ikuo
Research Institute for Electronic Science, Hokkaido University
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Kumano H
Research Institute For Electronic Science Hokkaido University
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UESUGI Katsuhiro
Research Institute for Electronic Science, Hokkaido University
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鈴木 久男
静岡大 創造科学技術大学院
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Katsuhiro Uesugi
Research Institute For Electronic Science Hokkaido University
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NASHIKI Hiroyuki
Research Institute for Electronic Science, Hokkaido University
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Suemune I
Hiroshima Univ. Higashihiroshima
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Nashiki Hiroyuki
Research Institute For Electronic Science Hokkaido University
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Uesugi K
Hokkaido Univ. Sapporo Jpn
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