K_2分子在强激光场下的量子调控:缀饰态选择性分布

利用含时量子波包法理论研究了分子在强激光场条件下的量子调控.选取K2分子的三态模型(基态|X〉、激发态|B〉和电离态|X+〉)作为研究对象.在强激光场的作用下,激发态|B〉缀饰成两个子态:|α〉态和|β〉态.分析K2分子电离后的光电子能谱,可以得到缀饰态|α〉和|β〉的能量和概率分布信息.同时,根据分子的缀饰态理论,提出了K2分子的缀饰态选择性分布方案.研究表明:调节激光场的强度可以实现对缀饰态能量的调控,改变激光场的波长可以实现对缀饰态概率的选择性分布.

Quantum control of K2 molecule in an intense laser field:Selective p opulation of dressed states

Control of molecular dynamics in an intense laser field has been studied by employing the time-dependent wave packet approach. A system of K₂ molecule in three states (ground state|X>, excited state |B> and ionized state|X⁺>) serves as a prototype which interacts with pump-probe laser fields. Interacting with an intense pump field, the excited state |B> splits into two substates: |α> and |β>. Information of the energies and probability distributions of dresses states |α> and |β> can be obtained by analysing the photoelectron spectra (PES) of K₂ molecule. Meanwhile, the scheme of selective population of dressed states (SPODS) has been put forward according to the dressed states theory of K₂ molecule. It is found that regulating the laser intensity can control the dressed state energies, and altering the laser wavelength can make the high selectivity of the dressed state population readied.
Keywords： quantum control time-dependent wave packet approach dressed states photoelectron spectra