单分子发射光子的统计性质:考虑系间穿越影响

Photon statistics of driven single molecule:The effects of intersystem crossing process

用产生函数(generating function)方法研究了单分子存在系间穿越过程的发射光子的统计性质,并给出了长时间极限下的发射光子的平均值<N>以及对应的Mandel Q参数的表达式.研究结果表明,在系间穿越过程存在的情况下,单分子发射光子的平均发射光子数<N>和对应的Mandel Q参数随时间都呈线性关系,并且Mandel Q参数对跃迁速率k23在长时间尺度上非常敏感.

We studied the photon statistics of the driven single molecule under intersystem crossing process which caused the fluorescence blinking via generating function approach.We give an analytical expression of the average emission photons N and the Mandel＇s Q parameter in long time limit.The results demonstrate that the Mandel＇s Q parameter has the same behavior as the average emission photons N with respect to the evolution time,both of them linearly increasing with the evolution time increase,when the intersystem crossing process occurred in the single molecule.