Lebedev Physical Institute, RAS, Moscow 119991, Russia.
J Chem Phys. 2009 Nov 14;131(18):185101. doi: 10.1063/1.3258272.
Blinking fluorescence of a single guest molecule embedded in a polymer matrix and excited by cw laser light is considered. Such fluorescence exhibits quantum jumps from bright on-intervals to dark off-intervals, i.e., so-called on-->off jumps. A system with one type of on-intervals and with two types of off-intervals is studied. A distribution function w(N)(T) for the number N of on-->off jumps in a time interval T is derived. The distribution function is expressed via a threefold integral of three Poissonian functions, each of which relates to the corresponding exponential process in the quantum dynamics of a fluorescent impurity center. Numerical calculations of the distribution function w(N)(T) for four time intervals T of various durations are carried out. The distribution function w(N)(T) is broader as compared with the Poissonian one and has two maxima, one of which relates to observed time intervals without on-->off jumps.
研究了在连续波激光激发下嵌入聚合物基质中的单个客体分子的闪烁荧光。这种荧光表现出从亮态到暗态的量子跃迁，即所谓的“开-关”跃迁。研究了具有一种亮态和两种暗态的系统。导出了在时间间隔 T 中开-关跃迁次数 N 的分布函数 w(N)(T)。该分布函数通过三个泊松函数的三重积分表示，每个泊松函数与荧光杂质中心量子动力学中相应的指数过程相关。对四个不同持续时间的时间间隔 T 的分布函数 w(N)(T)进行了数值计算。与泊松分布相比，该分布函数 w(N)(T)更宽，并且具有两个最大值，其中一个与观察到的没有开-关跃迁的时间间隔相关。
