The Shirlee Jacobs Femtosecond Laser Research Laboratory, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel.
Faraday Discuss. 2011;153:383-94; discussion 395-413. doi: 10.1039/c1fd00052g.
We investigate femtosecond photoassociation of thermally hot atoms in the gas phase and its coherent control. In the photoassociation process, formation of a chemical bond is facilitated by light in a free-to-bound optical transition. Here, we study free-to-bound photoassociation of a diatomic molecule induced by femtosecond pulses exciting a pair of scattering atoms interacting via the van-der-Waals-type electronic ground state potential into bound levels of an electronically excited state. The thermal gas of reactants is at temperatures in the range of hundreds of degrees. Despite this incoherent initial state, rotational and vibrational coherences are observed in the probing of the created Mg2 molecules.
我们研究了气相中热原子的飞秒光缔合及其相干控制。在光缔合过程中，自由到束缚的光跃迁中的光促进化学键的形成。在这里，我们研究了由飞秒脉冲激发一对通过范德华型电子基态相互作用的散射原子，将其诱导到电子激发态的束缚能级，从而实现双原子分子的自由到束缚光缔合。反应物的热气体处于数百摄氏度的温度范围内。尽管初始状态是非相干的，但在探测所生成的 Mg2 分子时，仍观察到了转动和振动相干性。
