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博碩士論文 etd-0810114-230332 詳細資訊
Title page for etd-0810114-230332
論文名稱
Title
利用時變兆赫波研究不具極性氧化鋅之光學特性
Study of optical properties of non-polar ZnO using Terahertz time domain spectroscopy
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
65
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2014-07-31
繳交日期
Date of Submission
2014-09-11
關鍵字
Keywords
兆赫時域、退火、德魯德模型、電導率、折射率
THz-TDS, annealing, Drude model, conductivity, refractive index
統計
Statistics
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The thesis/dissertation has been browsed 5739 times, has been downloaded 0 times.
中文摘要
在本論文中我們利用兆赫波入射到成長於m平面氧化鋅,我們的研究包括不具極性的a軸及c軸氧化鋅在熱退火前後期不同頻率的光學特性,我們研究出來在兆赫波下m平面氧化鋅的折射率與消光係數,利用兆赫波的時域光譜量測出來載子濃度和遷移率跟Drude 模型是相互吻合的,我們也發現m平面氧化鋅在經過退火前後有很大的光學特性變化,在這次的研究中我們觀測到氧化鋅在經過熱退火處理以後其載子濃度和遷移率會大於未經過熱退火處理。
Abstract
In this thesis we have performed detailed study on THz transmission through m-plane ZnO on m-plane sapphire substrate. We have studied the frequency dependent optical properties for annealed and unannealed non polar ZnO for a- and c-axis. The refractive indices and extinction coefficients of m-plane ZnO at THz range are reported. The carrier concentration and mobility determined using THz-TDS method show good agreement with simple Drude model. For annealed and unannealed m-plane ZnO we observed a significant difference for all the above mentioned optical properties. It is found that, for annealed ZnO, carrier concentration and mobility is larger than that of the unannealed ZnO.
目次 Table of Contents
論文審定書
Acknowledgements i
摘要 ii
Abstract iii
Contents iv
Table of Figures v
List of Tables viii
Chapter 1 Introduction 1
 1.1 THz radiation 1
 1.2 Generation of THz 3
 1.3 Zinc oxide (ZnO): introduction 5
 1.4 THz Research 7
 1.5 Importance of m-plane ZnO 10
Chapter 2 Generation of terahertz pulses from biased photo conductive antenna 10
 2.1 PC Emitter and it’s theoretical explanation 12
 2.2 Lock-in amplifier 19
Chapter 3 Experimental Setup and Calculation 21
 3.1 Theoretical Explanation 21
 3.2 Experimental Set-up 24
Chapter 4 Sample information and Data analysis 27
 4.1 Sample information 27
 4.2 Data analysis 30
Chapter 5 Conclusion 51
References 53
參考文獻 References
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