We study the two-photon absorption properties of frequency-entangled N00N states produced in a Hong-Ou-Mandel interferometer using type-I degenerate photon pairs, generated via spontaneous parametric down-conversion. By comparing our results with N00N states with no frequency entanglement, we demonstrate enhanced two-photon absorption due to frequency entanglement. We also derive an analytic expression for the enhancement factor which is found to be greater than one for all finite values of the ratio of the bandwidth of the pump to the bandwidth of the detected photons. We have also found suppression and enhancement in the two-photon absorption probabilities for specific time delays applied to the N00N states.

我们研究了在 Hong-Ou-Mandel 干涉仪中产生的频率纠缠 N00N 态的双光子吸收特性，使用 I 型简并光子对，通过自发参数下转换产生。通过将我们的结果与没有频率纠缠的 N00N 状态进行比较，我们证明了由于频率纠缠而增强的双光子吸收。我们还推导出增强因子的解析表达式，对于泵的带宽与检测到的光子的带宽之比的所有有限值，发现该增强因子大于 1。我们还发现了应用于 N00N 状态的特定时间延迟的双光子吸收概率的抑制和增强。