We consider the optical dipole potential energy, which arises from the interaction of a two-level atom with a circularly polarized Laguerre-Gaussian laser beam of small waist. The beam is characterized by the existence of a longitudinal electric field component which is responsible for the appearance of a chiral term in the optical dipole potential energy. This term reverses sign if either the winding number or the wave polarization of the beam reverses sign. We propose a scheme of a bi-chromatic vortex interaction with the two-level atom in which the resulting optical dipole potential is fully chiral.

中文翻译：

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两级原子的手征性光学偶极势能

我们考虑了光学偶极势能，它是由两能级原子与小腰圆偏振Laguerre-Gaussian激光束的相互作用产生的。该束的特征在于存在纵向电场分量，该纵向电场分量负责在光学偶极势能中出现手性项。如果梁的绕组数或波偏振使符号反转，则该术语使符号反转。我们提出了一个与两级原子发生双色涡旋相互作用的方案，其中所产生的光学偶极势是完全手性的。