Abstract
摘要：本群體研究中，我們將進行包括寬能隙氮化物及氧化物之新穎光電半導體奈米結構的生長、特性分析以及先導性應用研究，同時結合這些半導體奈米結構從事奈米光學研究。半導體奈米結構之研究乃基於有機金屬氣相沉積及分子束磊晶之樣品生長，包括四個課題：（1）氮化鎵奈米柱生長及其結合再生長；（2）氮化銦、富銦氮化銦鎵及相關量子井結構；（3）氧化鎘鋅鎂化合物及相關量子井結構；（4）氮化物及氧化物半導體混合生長。材料特性分析主要為瞭解其奈米材料、光及電之特性。先導性應用主要是嘗試高效率發光二極體及太陽能電池之製作。在奈米光學之探討，我們將著重在金屬及上述半導體奈米結構界面上表面電漿子之行為及表面電漿子與奈米結構耦合之新穎現象，同時也希望能實現表面電漿子雷射（表面電漿子類似光子雷射之行為）。我們將利用表面電漿子雷射的概念來進行生物檢測之先導性應用研究，同時表面電漿子與如量子井之耦合也可於發光二極體及太陽能電池內，以提昇他們的效率。由於上述氮化物與氧化物之材料及光電特性類似，本計畫中材料系統其實乃為一體，所有應用方向全與能源科技及生物醫學有關。全部共同九位具不同但互補專長（包括長晶、特性分析及元件設計與製程）之教師，共同為設定目標合作研究。
Abstract: In this research, we propose a team research for the growth, characterization, and preliminary applications of novel optoelectronics semiconductor nanostructures, including wide band-gap nitrides and oxides. Also, the combination of nano-photonics with such semiconductor nanostructures is studied. In the semiconductor nanostructure growth and characterization based on metalorganic chemical vapor deposition and molecular beam epitaxy, four issues are to be studied, including 1) the growth of GaN nano-columns (both self-organized and patterned substrate growths) and their coalescence overgrowth; 2) InN, indium-rich InGaN, and related quantum well structures; 3) CdZnMgO compounds and related quantum well structures, and 4) hybrid growth of nitrides and oxides. The characterizations include the understandings of the nano-material, electrical, and optical properties. The preliminary applications include the uses of those novel semiconductor nanostructures for the fabrications of efficient light-emitting devices and solar cells. In the study of nano-photonics, we focus on the behaviors of surface plasmons at the interfaces between metals and the aforementioned semiconductors, the novel phenomena of the coupling between the surface plasmons and the aforementioned semiconductor nanostructures, and the implementation of surface plasmon amplification by stimulated emission of radiation (SPASER). Preliminary bio-sensing application of SPASER and the use of surface plasmon coupling for enhancing emission efficiency of a light-emitting device and absorption efficiency of a solar cell will be realized. Because the material and optical properties of wide band-gap nitrides and oxides are quite similar, the proposed material systems are actually closely related. The targeted applications are all related to energy technology and health care. Nine faculty members of different expertise, including crystal growth, material analysis, electrical and optical characterizations, device design and process, work together for the targeted goals.
Keyword(s)
氮化鎵奈米柱
接合再生長
富銦氮化銦鎵
氧化鎘鋅鎂化合物
有機金屬氣相沉積
分子束磊晶
太陽能電池
發光二極體
表面電漿子
表面電漿子雷射
生物檢測。
GaN nano-columns
coalescence overgrowth
indium-rich InGaN
CdZnMgO compounds
metalorganic chemical vapor deposition (MOCVD)
molecular beam epitaxy (MBE)
solar cell
light-emitting device
surface plasmon
SPASER
bio-sensing
