Wang Le, Sun Jie, Yan Qun, Lin Jiao, Guo Weiling, Chen Enguo, Xu Chen, Liu Yongzhen
Opt Express. 2021 Sep 27;29(20):31520-31526. doi: 10.1364/OE.438135.
In existing flip-chip LED simulations, the light extraction efficiency is related to the multiple quantum well (MQW) to metal reflector distance because of optical interference. We calculate the contrast using several typical light intensity distributions among the several QWs in MQW. The coherence is obtained analytically. When the luminosity of each QW is equal, the contrast is ∼0, meaning the light is incoherent, contrary to traditional studies. The spatial coherence is important only when the light emission comes from just one QW. As the MQW has a not negligible thickness, the traditional single-dipole model is no longer accurate.
在现有的倒装芯片发光二极管模拟中，由于光干涉，光提取效率与多量子阱（MQW）到金属反射器的距离有关。我们使用MQW中几个量子阱之间的几种典型光强分布来计算对比度。相干性是通过解析得到的。当每个量子阱的发光度相等时，对比度约为0，这意味着光是非相干的，这与传统研究相反。只有当光发射仅来自一个量子阱时，空间相干性才重要。由于MQW具有不可忽略的厚度，传统的单偶极子模型不再准确。
