本計畫為”微共振腔式的有機雷射”，研究重點為利用微共振腔及有機增益結構，以電激發的方式驅動有機雷射，計畫必須要做到最佳微共振腔以及低電流密度，內容包括低吸收的微共振腔研究、低吸收透明導電膜之開發、Purcell 效應小模場體積之研究以及整體元件光電特性之量測。低吸收的微共振腔研究主要是由上下介電質反射鏡所構成，有機材料為空間層，但由於透明導電膜及薄金屬做為電極，金屬的強吸收造成相位不匹配，微共振腔的強度會減弱，必須要加入相位匹配層來補償，必須有所有材料的折射率及消光係數，優化膜層厚度，將相位匹配提高微共振腔的強度。低吸收透明導電膜之開發，在陽極方面找出折射率高、吸收更小的透明導電膜並考慮其功函數，陰極方面找出最佳的薄鋁金屬膜厚度，並求得薄金屬的折射率及消光係數以設計微共振腔並達到相位匹配。在Purcell 效應小模場體積之研究中，Purcell 效應為主要影響減少閥值的因素，低電流密度要使用微共振腔之Purcell 效應，利用薄的發光層對Purcell 效應及自發輻射的影響，增強材料自發輻射的特性，並限制作用區面積的大小，降低閥值電流密度，得到低閥值雷射。以上的研究內容將由台灣研究團隊與法國研究團隊合作進行，分工方式依據各團隊過去研究成果與經驗來互相搭配。中央大學薄膜中心在光學薄膜研究上成果豐富，在技術能力與相關設備上都是領先世界，負責微共振腔結構以及低吸收透明導電膜之研究、設計與製作。法國團隊(LPL UP13) 對於這樣的結構有研究，針對Purcell 效應對OLED 的影響並修改有機發光層的自發輻射現象，使有機雷射的閥值降低，負責有機結構鍍膜，與微共振腔之組立及整體元件光電特性之量測及Purcell 效應之研究，因此雙方在技術與能力上可以互補並相互支援，共同合作探討並提出解決電激發有機雷射的可能方法，本計劃在雙方結合下將可得到突破性的發展。 This research, Organic Lasers in Mircocavity will deal with organic lasers by electrical pumping use mircocavitiy and organic gain structure. This plan must be having best mircocavitiy and low current density. It includes research of low absorption mircocavity, development of low absorption transparent conductive oxide films, researching of Purcell effect of small mode volume, and measurement of optical and electric characteristics of the device. Research of low absorption microcavity will be carried out by the up and down the dielectric mirrors and space with organic materials. Electrodes are the transparent conductive oxide films and thin metal. The strong absorption of metallic film caused the mismatch of the phase will decrease the intensity of mircocavity, so it needs phase matching layer for the compensation. It must have all information of the refractive index and extinction coefficient of materials, then optimized layers thickness to match the phase to increase the intensity of the microcavity. Development of low absorption transparent conductive oxide films, finding out the high index, low absorption, and considering its work function for the anode are included. For the cathode, the optimal thickness of thin aluminum metal film and the refractive index and extinction coefficient of thin metallic films to design the microcavity and to match the phase will be studied. In the researching of Purcell effect of small mode volume, Purcell effect as the main influence to reduce threshold will be considered. Low current density using Purcell effect in microcavity will be studied. Using a thin emitter layer to enhance the spontaneous emission and limit the size of the active area to reduce the threshold current density, then get low threshold laser will be developed. The cooperation between the Taiwan group and French group is based on good relationship and the good experience in the past years. The TFTC NCU has well development in optical thin films and has a very good reputation in this field. The French group of the LPL UP13 has a good experience of OLED and will be in charge of the OLED deposition, of the microcavity assembling and of the power and spectral characterization of the light emission of the OLED. 研究期間：9908 ~ 10007
