提出了一种利用单束平面光波照明二元π相位板与透镜组合系统实现冷原子或冷分子囚禁的可控制光学八阱的方案, 计算了光学势阱的光强分布和可控光学八阱的几何与光学特征参数、强度梯度及其曲率; 讨论了从光学八阱到四阱或到双阱的演化过程。研究表明,通过相对于透镜移动二元π相位板可实现光学八阱到四阱或到双阱的连续双向演化。讨论了利用该可控光学八阱组成二维光学晶格的方案。

We propose a novel scheme to form a controllable eight-well optical trap for cold atoms or molecules by using an optical system of a binary π-phase plate and a lens illuminated by a plane light wave. We calculate the intensity distribution of the eight-well optical trap and the characteristic parameters of the eight-well trap (including geometric parameters, the intensity distribution, intensity gradients, and their curvatures), and discuss the evolution process of the optical trap from eight-well to four-well or from eight-well to double-well. The result shows that the proposed eight-well trap can be continuously changed into a four-well or double-well trap by moving the π-phase plate. We discuss the controllable optical lattice of eight-well which comes from combination of binary π-phase plate illuminated by single light beam and the rectangle lens combined system.