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| ???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
|---|---|---|
| dc.contributor.advisor | 陳永芳(Yang-Fang Chen) | |
| dc.contributor.author | Jia-Min Zeng | en |
| dc.contributor.author | 曾家珉 | zh_TW |
| dc.date.accessioned | 2021-06-16T06:57:00Z | - |
| dc.date.available | 2019-07-29 | |
| dc.date.copyright | 2014-07-29 | |
| dc.date.issued | 2014 | |
| dc.date.submitted | 2014-07-18 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/57668 | - |
| dc.description.abstract | 本論文研究碲化鋅量子點/硒化鋅第二型結構之旋偏振特性，我們發現雖然本奈米異質結構並沒有包含磁性物質，然而螢光會展現不同的旋偏振特性。我們研究發現使用不同的波長的雷射激發光，可以使其樣品展現不同的螢光的旋偏振特性。這樣的獨特旋偏振性質，在這個發展已久且已經有成熟的半導體元件的材料中，添加了一個新的特性，相信這個研究結果對新穎半導體元件的開發必定有所貢獻。 | zh_TW |
| dc.description.abstract | Spin polarization of light emission arising from self-assembled ZnTe/ZnSe quantum dots grown by molecular beam epitaxy is investigated. It is found that the magnitude and sign of the degree of spin polarization can be drastically
manipulated by excitation wavelength. The underlying mechanisms can be explained well based on the combination of band alignment, energy level splitting, as well as selection rule of optical transitions. The unique tunability of spin polarization of light emission by excitation wavelength adds an unprecedented feature to semiconductor materials, which have been studies for quite a long time. It is believed that the results obtained in this study will pave a key step for the development of optospintronics. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T06:57:00Z (GMT). No. of bitstreams: 1 ntu-103-R01245010-1.pdf: 6730684 bytes, checksum: 7eacc2ade9e304e41f0edb71e1fc27e9 (MD5) Previous issue date: 2014 | en |
| dc.description.tableofcontents | 口試委員會審定書i
致謝ii 中文摘要iv Abstract v Contents vi List of Figures viii 1 Introduction 1 2 Theoretical background 4 2.1 Quantum Dots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Quantum confinement effect . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 Theory of Photoluminescence . . . . . . . . . . . . . . . . . . . . . . . 10 2.4 Spin-orbit coupling in semiconductor . . . . . . . . . . . . . . . . . . . 15 2.5 Spin-dependent selection rule . . . . . . . . . . . . . . . . . . . . . . . . 23 3 Experimental Details 27 3.1 Monolayer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.2 Molecular Beam Epitaxy . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.3 Atomic Force Microscopy . . . . . . . . . . . . . . . . . . . . . . . . . 31 4 Reversing spin polarization of light emission from ZnTe quantum dots grown on ZnSe by excitation wavelength 34 4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.2 Experiments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4.3 Results and discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 5 Conclusions 45 References 46 | |
| dc.language.iso | en | |
| dc.subject | 碲化鋅 | zh_TW |
| dc.subject | 量子點 | zh_TW |
| dc.subject | 硒化鋅 | zh_TW |
| dc.subject | 旋偏振 | zh_TW |
| dc.subject | 第二型半導體 | zh_TW |
| dc.subject | QD | en |
| dc.subject | ZnTe | en |
| dc.subject | spin | en |
| dc.subject | ZnSe | en |
| dc.subject | polarization | en |
| dc.title | 硒化鋅/碲化鋅量子點/硒化鋅第二型半導體結構之光學旋偏振特性研究 | zh_TW |
| dc.title | Optical properties of circular polarization of ZnSe/ZnTe Quantum dots/ZnSe type II semiconductor heterostructures | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 102-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 梁啟德(Chi-Te Liang),林泰源(Tai-Yuan Lin) | |
| dc.subject.keyword | 碲化鋅,量子點,硒化鋅,旋偏振,第二型半導體, | zh_TW |
| dc.subject.keyword | spin,ZnTe,ZnSe,QD,polarization, | en |
| dc.relation.page | 52 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2014-07-18 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 應用物理所 | zh_TW |
| Appears in Collections: | 應用物理研究所 | |
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|---|---|---|---|
| ntu-103-1.pdf Restricted Access | 6.57 MB | Adobe PDF |
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