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首页> 外文期刊>Journal of the Optical Society of America, B. Optical Physics >Atomic coherences of on-resonant and off-resonant two-photon absorptions in a ladder-type atomic system
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Atomic coherences of on-resonant and off-resonant two-photon absorptions in a ladder-type atomic system

机译：梯型原子系统中共振和非共振双光子吸收的原子相干性

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摘要

We report the physical origins of the on-resonant and off-resonant two-photon absorption (TPA) in an open-laddertype atomic system of the 5S_(1∕2)(F=1)-5P_(3∕2)(F'= 0, 1, 2)-5D_(5∕2)(F" = 1, 2, 3) transitions in ~(87)Rb atoms. When the onresonant TPA, including electromagnetically induced transparency (EIT), was transformed into the off-resonant TPA according to the coupling laser frequency detuning, we clarified the dynamics of the atomic coherences by decomposing into the two-photon coherence (TC) and the crossover coherence (CC) terms mixed between onephoton coherence (OC) and TC terms. The physical origins of the two TPAs were completely different; the cause of the on-resonant TPA was the CC term, and that of the off-resonant TPA was the TC term.
机译：我们报告了5S_（1∕2）（F = 1）-5P_（3∕2）（F的开放阶梯型原子系统中的共振和非共振双光子吸收（TPA）的物理起源'= 0，1，2）-5D_（5∕2）（F“ = 1，2，3）在〜（87）Rb原子中跃迁。当包括电磁感应透明性（EIT）在内的非共振TPA转变为根据耦合激光频率失谐的非共振TPA，我们通过分解为单光子相干（OC）和TC项之间的双光子相干（TC）和交叉相干（CC）项来阐明原子相干的动力学这两个TPA的物理起源完全不同;谐振TPA的起因是CC术语，非谐振TPA的起因是TC术语。

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