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首页> 外文期刊>Physica, B. Condensed Matter >Photoluminescence studies of quantum-well structures in pulsed magnetic fields
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Photoluminescence studies of quantum-well structures in pulsed magnetic fields

机译：脉冲磁场中量子阱结构的光致发光研究

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Magneto-photoluminescence spectroscopy at low temperatures has proved to be a powerful technique for investigating the electronic states of quantum well-type semiconductor heterostructures and offers a complimentary tool to electrical transport studies. We have established a magneto-optical facility at NHMFL-LANL and have undertaken a comprehensive investigation of magneto-excitonic and Landau transitions in a large variety of undoped and doped quantum-well structures. Fiber optic probes are used to switch between steady state (to 18 T) and pulsed (to 65 T) magnetic fields applied perpendicular (Faraday geometry) and parallel (Voigt geometry) to the growth axis of the 2D layers. The pulsed field mode requires that the spectroscopic data acquisition to be obtained in 1-2 ms in the 'flat-top' region at the peak of the field. A broad range of samples have been investigated in pulsed magnetic fields as a function of temperature, sample geometry, and high pressure. Examples include single and coupled double quantum wells, modulation-doped quantum wells, and single interface heterojunction structures. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 18]
机译：事实证明，低温的磁光致发光光谱法是研究量子阱型半导体异质结构的电子状态的有力技术，并为电迁移研究提供了一种辅助工具。我们已经在NHMFL-LANL建立了一个磁光设备，并对各种未掺杂和掺杂的量子阱结构中的磁-激子和Landau跃迁进行了全面研究。光纤探针用于在垂直于（二维法拉第几何）生长轴（法拉第几何）和平行于垂直二维（Voigt几何）的稳态磁场（至18 T）和脉冲磁场（至65 T）之间进行切换。脉冲场模式要求在场峰值处的“平顶”区域中，在1-2毫秒内获得光谱数据。在脉冲磁场中，随着温度，样品几何形状和高压的变化，已经研究了各种各样的样品。例子包括单和耦合双量子阱，调制掺杂量子阱和单界面异质结结构。 （C）1998 Elsevier Science B.V.保留所有权利。 [参考：18]

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