论文标题
光学涡流与四极动物过渡的相互作用中的原子捕获和动力学
Atom trapping and dynamics in the interaction of optical vortices with quadrupole-active transitions
论文作者
论文摘要
最近的研究已经证实了光学涡流的耦合，例如拉瓜仪和贝塞尔 - 高斯模式，与四极杆活性原子过渡相结合。由于梯度耦合，尤其是在相对较大的绕组数字的情况下，这种相互作用已被证明在Laguerre-Gaussian梁的情况下得到了显着增强。在这里，我们考虑由两个同轴反向传播光学涡流梁产生的光学四极电位中原子的陷阱和动力学。我们专注于原子过渡$ 6^2s_ {1/2} \ rightarrow 5^2d_ {5/2} $ CS中的$ dipole-forbidden，但是四倍体允许的过渡。我们展示了这种原子过渡如何与近谐振的光学涡流场接触，从而导致原子诱捕光学四极电位势孔，并伴随着翻译运动。我们展示了光学作用如何生成被困在四极电位中的原子的运动，并使用典型的实验可访问参数说明了结果。
Recent studies have confirmed the coupling of optical vortices, such as Laguerre-Gaussian and Bessel-Gaussian modes, to quadrupole-active atomic transitions. This interaction has been shown to be enhanced considerably in the case of Laguerre-Gaussian beams due to the gradient coupling, particularly in the case of a relatively large winding number. Here we consider the trapping and the dynamics of atoms in the optical quadrupole potential generated by two co-axial counter-propagating optical vortex beams. We focus on the atomic transition $6^2S_{1/2}\rightarrow 5^2D_{5/2}$ in Cs which is a dipole-forbidden, but a quadrupole-allowed transition. We show how this atomic transition engages with the optical vortex fields at near-resonance, leading to atom trapping in the optical quadrupole potential well accompanied by translational motion. We show how the optical forces generate the motion of the atoms trapped within the quadrupole potential, illustrating the results using typical experimentally accessible parameters.
