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基于标准的Hanbury-Brown-Twiss探测方式下,研究了具有Poisson统计背景的实际单分子光子源与理想双分子系统的光子统计特性,通过比较分析二者在具有相同平均光子数n—时的Mandel参数,研究给出一种利用双光子的统计概率P(2)判别单分子的方法为P(2)<12(2-4-2n—)2.同时研究了单分子光子源的信号/背景比对分析结果的影响.
关键词:
单分子
Mandel参数
Poisson分布
信号/背景比 相似文献
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菲涅耳双棱镜放置方式对实验结果的影响 总被引:2,自引:1,他引:1
用菲涅耳双棱镜测光波波长实验是大学物理实验中的基础实验,它是用分波面法获得相干光的典型实验. 在实验装置中,双棱镜的放置方式有2种,即棱镜棱脊面向单缝还是背向单缝. 本文通过详细的理论推导,得出双棱镜的放置方式对实验结果没有影响的结论,而且这个结论已得到了实验的证实. 相似文献
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In this paper, we suggest a doubly degenerate four-level system, in which the transition takes place between the hyperfine energy 52S1/2 F = 1 and 52P3/2 F = 2 in rubidium 87 D2 line, for studying atomic phase grating based on the cross-Kerr and phase conjugation effects. The phase grating with high efficiency can be obtained by tuning phase shift Ф between the coupling and probe field, when the coupling intensity is much stronger than the strength of probe field. Under different coupling intensities, a high diffraction efficiency can be maintained. A new and simple way of implementing phase grating is presented. However, in such an atomic system, two main limitations must be taken into account. First, the independence between steady state probe susceptibility and the coupling intensity, when the population decay rate is larger than the Rabi frequency of the coupling field, cannot result in diffraction grating; second, the sample to be prepared should not be too long. 相似文献
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