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首页> 外文期刊>Journal of Crystal Growth >Photoluminescence at up to 2.4 μm wavelengths from GaInAsBi/AlInAs quantum wells
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Photoluminescence at up to 2.4 μm wavelengths from GaInAsBi/AlInAs quantum wells

机译:GaInAsBi / AlInAs量子阱在高达2.4μm波长处的光致发光

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摘要

5 nm, 10 nm and 20 nm-thick GaInAsBi quantum wells were grown on the InP:Fe(100) substrates by molecular beam epitaxy. The top and bottom barriers of quantum structures were 50 nm and 100 nm-thick lattice-matched AlInAs, respectively. Quantum wells were grown at the substrate temperature of about 240 ℃ The maximum bismuth content in the wells was 5.0%. Transmission electron microscopy images revealed sharp interfaces between the wells and barrier layers as well as homogeneous Bi incorporation. Photoluminescence (PL) measurements demonstrated signals from all QW up to the room temperature. PL intensity was stronger in thinner quantum wells where relaxation and clustering effects were avoided. The longest emission wavelength registered reached 2.4 μm.
机译:通过分子束外延在InP:Fe(100)衬底上生长了5 nm,10 nm和20 nm厚的GaInAsBi量子阱。量子结构的顶部和底部势垒分别为50 nm和100 nm厚的晶格匹配AlInAs。在约240℃的底物温度下生长量子阱。阱中的最大铋含量为5.0%。透射电子显微镜图像显示阱和势垒层之间的清晰界面以及均匀的Bi掺入。光致发光(PL)测量显示了从所有QW到室温的信号。在避免弛豫和聚集效应的较薄量子阱中,PL强度较强。记录的最长发射波长达到2.4μm。

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