论文标题
纠缠光子对激发的普通荧光团中的两光子吸收横截面上的界限
Setting bounds on two-photon absorption cross-sections in common fluorophores with entangled photon pair excitation
论文作者
论文摘要
用纠缠的光子对激发可能导致低光子通量下两光子吸收的效率提高。在许多理论和实验研究中已经研究了相应的过程，即纠缠的两光子吸收（E2PA）。然而，关于E2PA横截面的绝对值，文献中仍然存在明显的歧义和不一致。在这里，我们使用基于荧光的注册方案来实验确定六个荧光团横截面上的上限。这些边界比最小发布的横截面低四个数量级。对于其他由其他样品（Rhodamine 6G和9R-S）研究的样品，我们测量上限的四个和五个数量级比先前报道的横截面低。
Excitation with entangled photon pairs may lead to an increase in the efficiency of two-photon absorption at low photon flux. The corresponding process, entangled two-photon absorption (E2PA), has been investigated in numerous theoretical and experimental studies. However, significant ambiguity and inconsistency remain in the literature about the absolute values of E2PA cross-sections. Here, we use a fluorescence-based registration scheme to experimentally determine upper bounds on the cross-sections for six fluorophores. These bounds are up to four orders of magnitude lower than the smallest published cross-section. For two samples that have been studied by others, Rhodamine 6G and 9R-S, we measure upper bounds four and five orders of magnitude lower than the previously reported cross-sections.
