| Strain Relaxation Related Photoluminescence Bands in Ge／Si Short Period Superlattices |
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| 引用本文： | JIZhenguo NoritakaUsami 等.Strain Relaxation Related Photoluminescence Bands in Ge／Si Short Period Superlattices[J].半导体光子学与技术,1998,4(2):89-93. |
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| 作者姓名： | JIZhenguo NoritakaUsami |
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| 作者单位： | [1]ZhejiangUniversity,Hangzhou310027,CHN [2]ResearchCenterforAdvancedScienceandTechnology,UniversityofToky, |
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| 摘 要： | Pure-Ge/Si short period superlattice (SPS) grown by gas source MBE(GSMBE) is studied by photoluminescence spectroscopy and Raman scattering spectroscopy.An abnormal band in photoluminescence is found in an intermediate range of Lsi between 1.9nm-2.9nm for samples with Lge fixed at 1.5ml.In contrast to a pure-Ge/Si quantum well,the energy of the band shows red-shift as Lsi increases .Raman scattering shows that Si-Si vibration related Raman shift reaches a minimum for samples with strongest PL intensity of the abnormal band .It is therefore concluded that the abnormal band is related with strain relaxation process.
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| 关 键 词： | 光致发光 量子阱 半导体 生长取向性 超晶格 应力松驰 扩散 |
| 收稿时间： | 1997/12/19 |
Strain Relaxation Related Photoluminescence Bands in Ge/Si Short Period Superlattices |
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| JI Zhenguo.Strain Relaxation Related Photoluminescence Bands in Ge/Si Short Period Superlattices[J].Semiconductor Photonics and Technology,1998,4(2):89-93. |
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| Authors: | JI Zhenguo |
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| Abstract: | Pure-Ge/Si short period superlattice (SPS) grown by gas source MBE (GSMBE) is studied by photoluminescence spectroscopy and Raman scattering spectroscopy. An abnormal band in photoluminescence is found in an intermediate range of Lsi between 1.9 nm-2.9 nm for samples with LGe fixed at 1.5 ml. In contrast to a pure-Ge/Si quantum well, the energy of the band shows red-shift as Lsi increases. Raman scattering shows that Si-Si vibration related Raman shift reaches a minimum for samples with strongest PL intensity of the abnormal band. It is therefore concluded that the abnormal band is related with strain relaxation process. |
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| Keywords: | Photoluminescence Quantum Well Raman Scattering Strain Relaxation Superlattice |
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