Laser-assisted enantio-conversion is an ambitious issue related to chiral molecules in atomic, molecular, and optical physics. The theoretical laser-distillation method was proposed to realize enantio-conversion based on a four-level double-Δ model of two degenerated chiral ground states and two achiral excited states. Here, we re-investigate and improve the laser-distillation method so that a chiral mixture can be converted to an enantiopure sample of the desired chirality, i.e. complete enantio-conversion, which has not been discussed in previous theoretical works on the laser-distillation method. Since the undesired chirality may be inefficient, or even cause serious side effects in pharmacology, our work provides an important improvement to the original theoretical works on laser-assisted enantio-conversion.

激光辅助对映转换是原子、分子和光学物理中与手性分子相关的一个雄心勃勃的问题。基于两个简并手性基态和两个非手性激发态的四能级双Δ模型，提出了理论激光蒸馏方法来实现对映转换。在这里，我们重新研究并改进了激光蒸馏方法，以便将手性混合物转化为所需手性的对映纯样品，即完全对映转化，这在以前的激光蒸馏理论工作中没有讨论过方法。由于不需要的手性可能效率低下，甚至在药理学中引起严重的副作用，我们的工作为激光辅助对映转换的原始理论工作提供了重要的改进。