量子调控NaI分子的解离动力学

Quantum control of the dissociation dynamics of NaI molecule

利用含时量子波包法理论研究了Na 分子与超快飞秒激光脉冲场作用后的解离动力学。受到非绝热效应的影响,NaI分子的激发态波包传播到势能面的交叉区域时发生了分裂。一部分波包转移到V1态势能面上,另一部分波包则在V2态上解离成Na原子和I原子。研究结果表明,NaI分子的解离几率与激发态波包的传播速率有关。通过调节飞秒激光脉冲场的波长和脉冲宽度,可以改变激发态波包的传播速率,最终达到控制NaI分子解离动力学的目的。

The dissociation dynamics of NaI molecule in femtosecond laser field has been investigated by employed the time-dependent quantum wave packet approach. Subjected to the influence of non-adiabatic effect,NaI molecule splits into two parts when the excited wave packet reaches to the crossing region RX. One part transfers to the ionic state V1,and another part on the repulsive state V2 will be dissociated into Na and I atoms. It is found that the dissociation probability depends on the velocity of the excited wave packet. And,its velocity can be altered by tuning the wavelength and width of laser field. Ultimately,it realizes the control of the dissociation dynamics of NaI molecule.