Selecting rotational two-level coherence in polar molecules by double terahertz pulses
Selecting rotational two-level coherence in polar molecules by double terahertz pulses
复制标题
通过双太赫兹脉冲选择极性分子中的旋转两级相干性
DOI：
10.1103/physreva.90.041402
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and J. Itatani
中科院分区：
文献类型：
--
作者：
K. Kitano;N. Ishii;T. Kanai;and J. Itatani
我们在实验上展示了一种利用一对强太赫兹脉冲来控制喷射冷却旋转极性分子中二能级相干性的方法。太赫兹脉冲的宽光谱可以诱导四个转动态之间的共振布居转移，建立二能级相干.这种相干性由两个太赫兹脉冲之间的延迟控制，导致选择单个两级相干性。该方案可以扩展到通过施加一系列太赫兹脉冲来选择热分布分子系综中特定的两级相干性。
We demonstrate experimentally a method for controlling two-level coherence in jet-cooled rotating polar molecules by using a pair of intense terahertz pulses. The broad spectra of the terahertz pulses can induce resonant population transfer between four rotational statesto establish two-level coherence. This coherence is controlled by the delay between the two terahertz pulses, resulting in selection of a single two-level coherence. This scheme can be extended to select a specific two-level coherence in a thermally distributed molecular ensemble by applying a train of terahertz pulses.