完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | 廖國峰 | en_US |
dc.contributor.author | Liao, Kuo-Feng | en_US |
dc.contributor.author | 鄭舜仁 | en_US |
dc.contributor.author | Cheng, Shun-Jen | en_US |
dc.date.accessioned | 2014-12-12T02:37:57Z | - |
dc.date.available | 2014-12-12T02:37:57Z | - |
dc.date.issued | 2012 | en_US |
dc.identifier.uri | http://140.113.39.130/cdrfb3/record/nctu/#GT070052025 | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/73411 | - |
dc.description.abstract | 糾纏光子對在量子資訊領域為一個關鍵的要素,而能否形成糾纏光子對的條件為精細結構匹裂要遠小於線寬(約1μeV),然而實際上因為形狀、應變、原子擴散……等原因會使精細結構匹裂變大,而無應變GaAs/AlGaAs量子點可以單純研究形狀的影響。 價電帶混成(輕重電洞混成)對光偏振、精細結構匹裂扮演著一個重要的角色。本篇論文使用簡單模型研究量子點不同晶面方向、暗激子亮激子耦合如何影響輕重電洞混成,而進一步改變光偏振。結果顯示在[111]晶面方向的光偏振小於[001]方向;在零磁場之下暗激子亮激子耦合效應極小。 | zh_TW |
dc.description.abstract | Polarization-entangled pairs are a key element in the field of quantum information. The condition for generating polarization-entangled pairs is that fine structure splitting (FSS) must be smaller than the linewidth(~1μeV); however, many factors like shape, strain, atomic diffusion may increase FSS. And unstrained GaAs/AlGaAs quantum dots (QDs) is an excellent candidate easy to study due to nearly pure shape effect. Valence band mixing (VBM) plays a crucial role on optical polarization (DOP) and FSS. In this thesis, studying by using simple model how growth directions or bright-exciton (BX) and dark-exciton (DX) coupling affect component of light-hole (LH) of QDs, further changing DOP. The results show DOP in the [111] direction is smaller than the one in the [001] direction and BX-DX coupling is weak without magnetic field. | en_US |
dc.language.iso | zh_TW | en_US |
dc.subject | 量子點 | zh_TW |
dc.subject | 液滴磊晶 | zh_TW |
dc.subject | 光學異向性 | zh_TW |
dc.subject | 價電帶混成 | zh_TW |
dc.subject | 激子 | zh_TW |
dc.subject | [111]成長方向 | zh_TW |
dc.subject | 座標轉換 | zh_TW |
dc.subject | 亮激子 | zh_TW |
dc.subject | 暗激子 | zh_TW |
dc.subject | quantum dots | en_US |
dc.subject | droplet epitaxy | en_US |
dc.subject | optical anisotropy | en_US |
dc.subject | valence band mixing | en_US |
dc.subject | exciton | en_US |
dc.subject | [111] growth direction | en_US |
dc.subject | coordinate transformation | en_US |
dc.subject | bright exciton | en_US |
dc.subject | dark exciton | en_US |
dc.title | 無應變GaAs/AlGaAs量子點在[111]成長方向的光學異向性 | zh_TW |
dc.title | Optical anisotropy of unstrained GaAs/AlGaAs quantum dots in [111] growth direction | en_US |
dc.type | Thesis | en_US |
dc.contributor.department | 電子物理系所 | zh_TW |
顯示於類別: | 畢業論文 |