United time-frequency spectroscopy for dynamics and global structure
United time-frequency spectroscopy for dynamics and global structure
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DOI：
10.1126/science.1105660
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发表时间：
2004-12-17
期刊：
影响因子：
56.9
通讯作者：
Ye, J
中科院分区：
文献类型：
--
作者：
Marian, A;Stowe, MC;Ye, J
到目前为止，超短激光脉冲已经以两种不同的模式使用。在时域中，脉冲允许在亚皮秒时间尺度上探测和操纵动态。最近，相位稳定已经产生了在宽带宽上具有绝对频率参考的光学频率梳。在这里，我们联合收割机这两个应用在铷原子的光谱研究。采用宽带宽、相位稳定的飞秒激光器对粒子数转移的动态演化过程进行实时监测。相干脉冲积累和量子干涉效应的观察和良好的理论模型。同时，单个梳状线的窄线宽允许精确和有效地确定全局能级结构，提供光学、太赫兹和射频域之间的直接连接。探索和控制原子样品上的光学频率梳的机械作用，从而导致系统误差明显减少的精密光谱学。
Ultrashort laser pulses have thus far been used in two distinct modes. In the time domain, the pulses have allowed probing and manipulation of dynamics on a subpicosecond time scale. More recently, phase stabilization has produced optical frequency combs with absolute frequency reference across a broad bandwidth. Here we combine these two applications in a spectroscopic study of rubidium atoms. A wide-bandwidth, phase-stabilized femto-second laser is used to monitor the real-time dynamic evolution of population transfer. Coherent pulse accumulation and quantum interference effects are observed and well modeled by theory. At the same time, the narrow line-width of individual comb lines permits a precise and efficient determination of the global energy-level structure, providing a direct connection among the optical, terahertz, and radio-frequency domains. The mechanical action of the optical frequency comb on the atomic sample is explored and controlled, leading to precision spectroscopy with an appreciable reduction in systematic errors.