非均匀介质中发光中心自发辐射速率的局域场效应  

Local field effects on spontaneous emission rates of emitters in heterogeneous dielectric media

作　　者：陈立果[1] 吕亚兰[2] 

机构地区：[1]重庆邮电大学光电工程学院,重庆400065 [2]西安电子科技大学机电工程学院,西安710071

出　　处：《重庆邮电大学学报（自然科学版）》2007年第B06期25-27,共3页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

摘　　要：介质中发光中心的自发辐射速率与发光中心处的微观局域电场和介质中的宏观电场的比值相关,从而对环境介质的折射率存在一定的依赖。在虚腔模型和实验模型基础上,提出了一种通过数值计算来研究非均匀介质中发光中心自发辐射速率的局域场效应的方法,数值模拟的结果表明均匀介质中发光中心自发辐射速率的局域场效应并非完全满足虚腔或实腔模型。Spontaneous emission rate of emitters embedded in media is relative to the ratio of the local field felt by an emitter to the macroscopic field, so that there are some different dependences of spontaneous emission rates on refractive index of the surrounding media. Various models have been developed to study the dependences of spontaneous emission rates on different surrounding media. There are two mainly models, virtual-cavity and real-cavity models, which are based on a macroscopic description of dielectrics and the assumption that the dielectrics are taken to be homogeneous. A numerical method for local field effects of spontaneous emission rates of emitters in heterogeneous dielectrics is brought forward.

关 键 词：非均匀介质 局域场效应 自发辐射速率 折射率 数值计算 

分 类 号：TN304.3[电子电信—物理电子学] O751[理学—晶体学]