Epitaxial Growth of Non-Equilibrium Crystals and their Exciton Spectra
| Project/Area Number |
09640391
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
固体物性Ⅰ(光物性・半導体・誘電体)
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| Research Institution | Shinshu University |
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Principal Investigator |
ITOH Minoru Shinshu University, Faculty of Engineering, Professor, 工学部, 教授 (80126664)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | Epitaxial Growth / Optical Spectra / Non-Equilibrium Crystal / Insulating Crystal / Exciton / Optoelectronics |
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| Research Abstract |
1. A new vacuum chamber was constructed for epitaxial growth of non-equilibrium ionic crystals.
2. By using a RbBr (100) crystal surface cleaved in vacuum as a substrate, NaCl-structured CsI thin films were successfully grown on it.
3. CsCI-structured CsI thin films were also prepared on a RbI single crystal cleaved in vacuum.
4. The thickness of both films was about 5 nm.
5. Both films were found to show sharp exciton bands of NaCl- and CsCl-types in the absorption spectra, respectively.
6. Luminescence properties, especially decay profile, of some samples were investigated under the excitation with a Nd : YAG laser purchased by the present Grant-in-Aid.
7. The PbF_2 crystal has two different structural modifications even at normal condition ; cubic and orthorhombic. Several kinds of optical spectra of both phases were studied. A part of the obtained results have been already published or accepted for publication.
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Report
(3 results)
Research Products
(11 results)
