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High optical property vertically aligned InAs quantum dot structures with GaAsSb overgrown layers

机译:具有GaAsSb过度生长层的高光学特性垂直对准的InAs量子点结构

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摘要

This study investigates the feasibility of growing high quality columnar InAs/GaAsSb quantum dots ((IDs) on a GaAs (1 0 0) substrate using a molecular beam epitaxial system. Structural and photoluminescence (PL) studies are conducted on vertically aligned, ten-period InAs quantum dot (QD) stacks with two different overgrown layer designs. Experimental results indicate an increased dot density of 5×10~(10)cm~(-2) with completely suppressed coalescences in vertically aligned InAs quantum dots capped by a GaAsSb layer. This finding demonstrates a columnar dot structure with an enhanced luminescent intensity, activation energy, and narrow spectral line width of 22 meV.
机译:这项研究调查了使用分子束外延系统在GaAs(1 0 0)衬底上生长高质量柱状InAs / GaAsSb量子点(ID)的可行性,并在垂直排列,十个方向上进行了结构和光致发光(PL)研究。两种不同过长层设计的周期InAs量子点(QD)堆叠实验结果表明,在垂直排列的GaAsSb覆盖的InAs量子点中,点密度增加了5×10〜(10)cm〜(-2),并且完全被抑制了聚结该发现证明了具有增强的发光强度,活化能和22meV的窄谱线宽度的柱状点结构。

著录项

  • 来源
    《Journal of Crystal Growth》 |2011年第1期|p.164-166|共3页
  • 作者单位

    Department of Photonics Engineering, Yuan Ze University, Chung-Li, Taiwan;

    Department of Photonics Engineering, Yuan Ze University, Chung-Li, Taiwan;

    Department of Electrical Engineering, National Central University, Chung-Li, Taiwan;

    Department of Electrical Engineering, National Central University, Chung-Li, Taiwan;

    Department of Physics and Center for Nano Science and Technology, National Central University, Chung-Li, Taiwan;

    Department of Physics and Center for Nano Science and Technology, National Central University, Chung-Li, Taiwan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A1. Nanostructures; A3. Molecular beam epitaxy; B2. Semiconducting III-V materials; B2. Semiconducting indium compound;

    机译:A1。纳米结构;A3。分子束外延;B2。半导体III-V材料;B2。半导体铟化合物;

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