1997 Fiscal Year Final Research Report Summary
Developement of a new modulation spectroscopy by exciting polarized light
| Project/Area Number |
08555006
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Kobe University |
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Principal Investigator |
NISHINO Taneo Kobe University, Faculty of Engineering, Professor, 工学部, 教授 (60029452)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAGUCHI Harunori Hitachi Cable, Ltd., Advance Research Center Laboratory, Senior Researcher, アドバースリサーチセンタ, 主任研究員
KITA Takashi Kobe University, Faculty of Engineering, Research Associate, 工学部, 助手 (10221186)
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| Project Period (FY) |
1996 – 1997
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| Keywords | Modulation Spectroscopy / Reflectance difference / Semiconductor Surface / Electronic States / 半導体量子構造 |
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| Research Abstract |
We developed a new modulation technique for semiconductor quantum structures by using polarization anisotropy. We focus our attention on reflectance signal modulated by polarized light. The summary of this research are followed. (1) In order to develope an analysis method, we theoretically investigated dielectric functions at semiconductor surfaces. (2) We developed a new in-situ characterization system to observe electronic states during the crystal growth. A probe light irradiate the sample surface, and the polarization modulated signal was detected. It was found that the incident angle of the probe light is important to observe the surface electronic states. (3) An anisotropic character was observed for the p and s waves of the probe light, which reflect the anisotropy of the dielectric function coming from surface morphology and surface reconstructions.This realizes a new sensitive detection of electronic states localized at the surface. By using this technique, we can observe the electronic states changed by the abrupt surface and adsorped atoms. (4) Our developed system can measure a modulation spectrum and its dynamic character during the growth. This technique promises a practical use of the in-situ modulation spectroscopy.
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