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Intersubband optical transitions in ZnO-based quantum wells grown by plasma-assisted molecular beam epitaxy

机译:等离子体辅助分子束外延生长的基于ZnO的量子阱中的子带间光学跃迁

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摘要

Intersubband optical transitions in ZnO-based quantum wells grown by plasma-assisted molecular beam epitaxy are investigated by a photocurrent spectroscopy. ZnO/MgZnO multiple quantum well (MQW) structures containing different ZnO well thicknesses are prepared. Photocurrent peaks are observed when the polarization of incident light is TM mode, following the intersubband selection rule. On reducing the ZnO well thickness, photocurrent peaks shifted to higher energies. Calculation indicates that the photocurrent peaks are due to intersubband transitions from the first to the third subband in ZnO/MgZnO MQWs. Comparison between experiment and calculation allows us to estimate the band offset ratio.
机译:通过光电流光谱研究了等离子体辅助分子束外延生长的基于ZnO的量子阱中的子带间光学跃迁。制备了包含不同ZnO阱厚度的ZnO / MgZnO多量子阱(MQW)结构。遵循子带间选择规则,当入射光的偏振为TM模式时,会观察到光电流峰值。在减小ZnO阱厚度时,光电流峰移至更高的能量。计算表明,光电流峰值是由于ZnO / MgZnO MQW中从第一子带到第三子带的子带间跃迁引起的。实验和计算之间的比较使我们能够估计带偏移比。

著录项

  • 来源
    《Journal of Crystal Growth》 |2009年第7期|2176-2178|共3页
  • 作者单位

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan;

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan;

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan;

  • 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

    A3. Molecular Beam Epitaxy; A3. Quantum well; B1. Oxides; B2. Semiconducting II-VI materials; B3. Heterojunction semiconductor devices;

    机译:A3。分子束外延;A3。量子阱;B1。氧化物;B2。 II-VI半导体材料;B3。异质结半导体器件;

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