Kitano K, Maeda H
Opt Lett. 2023 Jan 1;48(1):69-72. doi: 10.1364/OL.473200.
We investigated the superfluorescent decay process of dense rubidium atomic vapor in a cell. Using a femtosecond laser pulse, the atoms were excited from the 5S ground state to the 6P state. The 2.73m and 1.37m fields were generated on the cascaded decay, 6P → 6S → 5P, which further stimulated the 780 nm forward emission on the 5P → 5S transition. Using sum frequency generation (SFG) spectroscopy, we observed all emission fields and the time delay between them, with sufficient temporal resolution. The experimental results were successfully reproduced using semiclassical simulations.
我们研究了细胞中密集铷原子蒸气的超荧光衰变过程。使用飞秒激光脉冲，原子从5S基态被激发到6P态。在级联衰变6P→6S→5P上产生了2.73米和1.37米的场，这进一步激发了5P→5S跃迁上的780纳米向前发射。使用和频产生（SFG）光谱，我们以足够的时间分辨率观察到了所有发射场及其之间的时间延迟。使用半经典模拟成功再现了实验结果。
