光激發有機極化子元件之模擬與分析

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姓名

高維笛(Wei-Di Kao) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

光激發有機極化子元件之模擬與分析
(Simulation and analysis of the optically pumped organic polariton device)

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摘要(中)

本論文研究由金屬-介電質反射鏡組成的有機微共振腔內激子與光子強耦合的現象，建立理論模型分析光激發極化子能態的能量色散與光強分布。此理論模型之建立乃根據Lidzey團隊的研究基礎，其中極化子分布主要由下列幾項因素決定，包括(1)有機分子的光吸收或者分子振動，(2)玻色-愛因斯坦分布機率(Bose-Einstein distribution)，(3)激子庫(exciton reservoir)的激發，和(4)極化子往下支最低能態散射的散射效率。首先本論文藉由模擬Lidzey團隊的極化子元件下支能態之螢光強度分布，得到與Lidzey團隊文獻[1]一致結果，成功驗證所使用的極化子模型的正確性。接著將此模型應用於本實驗室實際製作之不同腔長的DEDOC強耦合共振腔元件，模擬極化子光強分布，發現與量測結果有相似的趨勢，其結果顯示極化子往下支最低能態散射的瓶頸效應(bottleneck effect)為極化子發光之主要損耗機制，而在實作上可透過製作detuning 為正值的極化子元件來降低瓶頸效應，提高散射至最低能態的效率進而增加最低能態極化子的數量與發光強度。

摘要(英)

In this study, we investigated the photon and exciton strong coupling phenomenon in the metal-dielectric mirror organic microcavity, and established the model to analyze the dispersion relation and PL intensity distribution of polariton states. This model based on Lidzey’s research, the polariton population is determined by following some factors: the absorption or emission of a molecular vibration, Bose-Einstein distribution, radiative pumping of polariton states, and the polariton scattering ef?ciency into the bottom of lower polariton branch(LPB). We proved the model correctness by simulating the intensity distribution from the Lidzey’s group. Next, polariton devices which the material of exciton is DEDOC cyanine dye was analyzed by the model. The LPB PL intensity distribution of simulation approximate experiment results. From the simulation results, the bottleneck effect is majority mechanism decreasing the PL intensity. In experiment, we can manufacture the positive detuning polariton device to decrease the bottleneck effect and raise the polariton scattering efficiency into lowest LPB state to enhance polariton population and the PL intensity.

關鍵字(中)

★ 極化子
★ 微共振腔
★ 強耦合

關鍵字(英)

★ polariton
★ mirocavity
★ strong coupling

論文目次

目錄
摘要 i
Abstract ii
致謝 iii
目錄 iv
圖目錄 vii
表目錄 x
第一章緒論 1
1-1 研究背景 1
1-2 有機激子與光子強耦合研究發展 6
1-3 研究動機 9
第二章原理與理論分析 10
2-1 微共振腔的薄膜理論 10
2-1-1 多層膜的穿透與反射 10
2-1-2 斜向入射的修正 12
2-1-3 非相干性的穿透與反射 13
2-1-4 電場分布 14
2-2 微共振腔內的強耦合共振模態 15
2-2-1 微共振腔的色散關係 15
2-2-2 微共振腔內的強耦合作用 17
2-3 有機強耦合的材料 22
2-4 光激發有機極化子元件螢光強度分布 24
第三章實驗方法 26
3-1 有機極化子元件的製程 26
3-1-1 有機染料分子高吸收薄膜的製程及特性 26
3-1-2 有機微共振腔的製程與設計 30
3-2 微共振腔的光學量測 33
3-2-1 紫外光/可見光光譜儀 33
3-2-2 可變角度積分球光譜儀 34
3-2-3 光致發光量測系統 35
第四章有機微共振腔的模擬 36
4-1 有機極化子元件模擬理論 36
4-1-1 理論模型(The dynamic model) 36
4-1-2 極化子的瓶頸效應(polariton bottleneck effect) 42
4-1-3 不同能態下的極化子元件特性模擬結果與分析 45
4-1-4 不同溫度下極化子螢光強度分布的分析 51
4-2 DEDOC有機極化子元件的模擬與分析 54
4-2-1 不同有機極化子元件的色散關係 54
4-2-2 不同有機極化子元件的模擬結果與分析 56
第五章結論與未來展望 63
參考文獻 66

參考文獻

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指導教授

李正中、張瑞芬(Cheng-Chung?Lee Jui-Fen Chang)

審核日期

2017-1-12

推文