完整後設資料紀錄
DC 欄位語言
dc.contributor.author廖國峰en_US
dc.contributor.authorLiao, Kuo-Fengen_US
dc.contributor.author鄭舜仁en_US
dc.contributor.authorCheng, Shun-Jenen_US
dc.date.accessioned2014-12-12T02:37:57Z-
dc.date.available2014-12-12T02:37:57Z-
dc.date.issued2012en_US
dc.identifier.urihttp://140.113.39.130/cdrfb3/record/nctu/#GT070052025en_US
dc.identifier.urihttp://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.abstractPolarization-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.isozh_TWen_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.subjectquantum dotsen_US
dc.subjectdroplet epitaxyen_US
dc.subjectoptical anisotropyen_US
dc.subjectvalence band mixingen_US
dc.subjectexcitonen_US
dc.subject[111] growth directionen_US
dc.subjectcoordinate transformationen_US
dc.subjectbright excitonen_US
dc.subjectdark excitonen_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.titleOptical anisotropy of unstrained GaAs/AlGaAs quantum dots in [111] growth directionen_US
dc.typeThesisen_US
dc.contributor.department電子物理系所zh_TW
顯示於類別:畢業論文