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模块化化CdTe多个量子洞的磁光发光

Wiktoria Solarska¹, Krzysztof Karpierz¹, Maciej Zaremba¹

¹Faculty of Physics, University of Warsaw, L. Pasteura 5, 02-093 Warsaw, Poland.

|November 6, 2023

概括

研究人员使用光发光和光谱学研究了模拟化量子井 (QWs). 单个和多个QW样本之间的光发光的差异表明这些量子结构中存在不同的电子孔重组机制.

科学领域:

半导体物理半导体物理
量子井工程是量子井的工程.
材料科学是一种材料科学.

背景情况:

在先进的电子和光电子设备中,调制化量子井 (QWs) 是至关重要的.
CdTe/CdMgTe异构结构提供可调节的电子和光学特性.
了解QW中的载波动态对于设备性能至关重要.

研究的目的:

为了研究调制合的CdTe/CdMgTe量子井的光学特性.
为了比较单个QW (SQW) 和多个QW (MQW) 结构的光发光特性.
阐明不同QW配置中的电子和孔的重组机制.

主要方法:

在磁场下的4.2K光发光 (PL) 光谱学.
远红外里埃光谱在4.2K. 在4.2K.
在室温下进行拉曼光谱.
使用不同间隔厚度的SQW和MQW样本的制造和表征.

主要成果:

在SQW和MQW样本之间观察到不同的光发光能范围.
在MQW样本中存在Phonon复制品,但在SQW样本中不存在.
对PL强度振荡的分析显示,自由电子与SQW中的自由孔和MQW中的局部孔的重组.

结论:

每个井的电子度在MQW比SQW样本更高,这是由于间隔器厚度减少.
在SQW和MQW结构之间,重组动力学显著不同.
调制-兴奋剂和QW安排极大地影响CdTe/CdMgTe系统中的载体行为和光学辐射.

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