Quesada Nicolás, Sipe J E
McLennan Physical Laboratories, University of Toronto, 60 St. George Street, Toronto, Ontario M5S1A7, Canada.
Phys Rev Lett. 2015 Mar 6;114(9):093903. doi: 10.1103/PhysRevLett.114.093903. Epub 2015 Mar 5.
We study the effects of time ordering in photon generation processes such as spontaneous parametric down-conversion (SPDC) and four wave mixing (SFWM). The results presented here are used to construct an intuitive picture that allows us to predict when time-ordering effects significantly modify the joint spectral amplitude (JSA) of the photons generated in SPDC and SFWM. These effects become important only when the photons being generated lie with the pump beam that travels through the nonlinear material for a significant amount of time. Thus sources of spectrally separable photons are ideal candidates for the observation of modifications of the JSA due to time ordering.
我们研究了诸如自发参量下转换（SPDC）和四波混频（SFWM）等光子产生过程中时间排序的影响。此处呈现的结果用于构建一个直观的图像，使我们能够预测何时时间排序效应会显著改变SPDC和SFWM中产生的光子的联合光谱幅度（JSA）。只有当所产生的光子与在非线性材料中传播相当长时间的泵浦光束处于同一位置时，这些效应才会变得重要。因此，光谱可分离光子源是观察由于时间排序导致的JSA变化的理想候选者。
