螢光奈米粒子藉由光波導之能量轉移研究

Energy transfer from InGaN quantum wells to fluorescent nanoparticles via optical waveguiding

林晧庭(Hau-Ting Lin)

指導教授 ： 沈志霖

中原大學/理學院/應用物理研究所/碩士(2011年)

https://doi.org/10.6840/CYCU.2011.00224

摘要

本文設計了一個光波導式的方法，藉由全反射的概念，研究施子與受子之間的螢光共振能量轉移。第一部分，使用氮化銦鎵/氮化鎵量子井作為施子、硒化鎘/硫化鋅量子點當作受子，在室溫下利用光激螢光光譜及時間鑑別光激螢光光譜，成功觀察到光波導傳遞方式之螢光共振能量轉移，並獲得轉換效率為0.54。第二部分則是改用螢光金奈米團簇作為受子，在低溫下研究其螢光強度及載子生命期變化，求出能量轉移效率高達0.72外，並藉由一系列速率方程式成功模擬螢光共振能量轉移之機制。

關鍵字

螢光奈米粒子 ； 光波導 ； 能量轉移 ； 量子井

並列摘要

In this thesis, we study the fluorescence resonance energy transfer (FRET) from donor to acceptor via optical waveguiding, i.e., the total internal reflection.In the first part, we used the InGaN/GaN quantum wells as donors, and CdSe/ZnS quantum dots as acceptors. We successfully observed FRET via waveguiding and obtained a transfer efficiency of ~0.54 from the steady-state and time-resolved photoluminescence (PL and TRPL) in room temperature. In the second part of the thesis, fluorescent gold nanoclusters instead of the CdSe/ZnS quantum dots were used as acceptors. PL and TRPL measurements provided a conclusive evidence of FRET through optical waveguiding. The obtained transfer efficiency of is found to be ~0.72. The kinetics of FRET were successfully modeled by a set of rate equations.

並列關鍵字

quantum well ； fluorescent nanoparticle ； optical waveguide ； Energy transfer

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