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研究生：	程義方 Cheng, Yi-Fang
論文名稱：	理論研究在光學密度介質中的三腳架受激拉曼緩變過程 Theoretical Study of Tripod Stimulated Raman Adiabatic Passage in an Optical Dense Medium
指導教授：	陳泳帆 Chen, Yong-Fan
學位類別：	碩士 Master
系所名稱：	理學院 - 物理學系 Department of Physics
論文出版年：	2017
畢業學年度：	105
語文別：	英文
論文頁數：	44
中文關鍵詞：	三腳架系統、受激拉曼絕熱過程、光學密度介質
外文關鍵詞：	Tripod System, Stimulated Raman Adiabatic Passage, Optical Dense Medium
相關次數：	點閱：110 下載：3
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本論文探討在三腳架能階系統中的受激拉曼緩變過程，我們推導了Unanyan和其合作者提出的理論結果。在緩變條件下，居量只會透過暗態轉換。但是當緩變條件不滿足時，非暗態會出現而伴隨著拉比震盪效應與自發輻射效應。我們也測試了不同脈衝時序，和討論光學密度對三腳架受激拉曼過程的影響。

We report on a theoretical study of stimulated Raman adiabatic passage of tripod system. We derive the results proposed by Unanyan et al. In the adiabatic condition, the populations are transferred through dark state only. However, if the adiabatic condition is not satisfied, the non-dark states will appear, and the process will be affected by the Rabi oscillation phenomenon and spontaneous decay effect. We also control the time and shape of the pulses to see how they change the populations. Furthermore, we discuss the optical density effect in the tripod stimulated Raman adiabatic passage medium.

摘要 i 
Abstract ii 
誌謝 iii 
Table of Contents iv
List of Figures vi
Chapter 1. Introduction 1
Chapter 2. Conherent Population Trapping 2
2.1 Coherent population trapping.........................2
2.2 Electromagnetically induced transparency.............4
Chapter 3. Theoretical Model of STIRAP 6
3.1 Three-level Λ-type system............................6
3.2 Four-level tripod-type system.......................11
Chapter 4. Physical Properties of the Tripod STIRAP.....17
4.1 Rabi oscillation phenomenon.........................17
4.1.1 Two level system..................................17
4.1.2 Four-level tripod system..........................18
4.2 Spontaneous decay effect in tripod STIRAP...........20
4.3 Population Transfer in the tripod STIRAP............22
4.3.1 Pulse Shape.......................................22
4.3.2 Timing control of pulses..........................26
Chapter 5. Population Gradient of Tripod STIRAP Medium..28
5.1 Optical pulse distortion effect.....................28
5.2 Optical density effect on population gradient.......30
Chapter 6. Conclusion and Outlook.......................34
References..............................................35
Appendix A. The Entropy of Quantum State................36
Appendix B. Kramers-Kronig Relation in Several Quantum Systems.......38
B.1 KK relation.........................................38
B.2 two-level system....................................40
B.3 EIT system..........................................42
B.4 CPT system..........................................43
                                    

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校內：2019-09-01公開
校外：2019-09-01公開

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