| 利用X射线衍射分析自组织生长的量子点结构 |
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| 引用本文： | 张党卫,张景文,侯洵.利用X射线衍射分析自组织生长的量子点结构[J].光子学报,2002,31(7):837-840. |
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| 作者姓名： | 张党卫 张景文 侯洵 |
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| 作者单位： | 1. 西北大学光子学与光子技术研究所,西安,710069
2. 中国科学院西安光学精密机械研究所,西安,710068 |
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| 摘 要： | 将InAs/GaAs多层量子点处理成夹层结构,考虑到大的应变,用多层膜的X射线衍射的动理学理论进行了理论模拟,得出其应变参量及各层厚度.将量子点近似看成金字塔形,从而点的衍射可以看成三角形衍射,利用三角形的傅里叶变换,求得量子点的横向周期为10.6nm,与三轴衍射结果求得量子点的横向周期(10.7±0.2nm)一致,说明本模型的可靠性.
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| 关 键 词： | X射线衍射 量子点 动理学理论 金字塔形 |
| 收稿时间： | 2001/5/31 |
| 修稿时间： | 2001年5月31日 |
X-RAY DIFFRACTION FROM SELF-ORIGINIZED QUANTUM-DOTS |
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| Zhang Dangwei,Zhang Jingwen,Hou Xun.X-RAY DIFFRACTION FROM SELF-ORIGINIZED QUANTUM-DOTS[J].Acta Photonica Sinica,2002,31(7):837-840. |
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| Authors: | Zhang Dangwei Zhang Jingwen Hou Xun |
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| Institution: | 1. Institute of Photonics &; Photon Technology, and Provincial Key Laboratory of Photoelectronic Technology, Northwest University, Xi’an 710069;2. Xi’an Institute of Optics &; Precision Mechanics, Chinese Academy of Sciencen, Xi’an 710068 |
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| Abstract: | Multi-layer quantum-dots (QDs) is treated as sandwich structure with large strain.Kinematical theory of multi-layer is applied to simulate experiment result successfully;strain parameters and thickness of each layer are got.QD is considered as pyramid approximately,the diffraction of QDs then regard as diffraction of triangle.The QDs transverse period(10.6nm),which is consistent with result(10.7?0.2nm) from three axis diffraction,is found through transform of Fourier. |
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| Keywords: | X ray diffraction Quantum dots Kinematical theory Pyramid |
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