标题： 碱金属原子在介质-蒸气界面的倏逝场中的高效光学抽运 显示英文标题

标题： Efficient optical pumping of alkaline atoms for evanescent fields at dielectric-vapor interfaces

摘要： 我们实验上展示了通过在介质-蒸气界面处的倏逝电磁场探测的铷原子的超精细光学抽运。 这种纳米尺度的光-原子相互作用是通过集成有蒸气室的直角棱镜，并在全内反射下由倏逝波激发来研究的。 当泵浦激光束以垂直入射到界面时，观察到一种高效的超精细光学抽运，导致探测的倏逝信号吸收完全被抑制。 相反，当泵浦光和探测光在集成棱镜-蒸气室中同向传播时，没有观察到光学抽运的明显证据。 实验结果得到了基于四能级原子结构的光学布洛赫方程的详细模型的支持。 在芯片上实现的纳米尺度的高度高效的光学抽运被认为是寻找如光开关、磁强计和量子存储等应用的重要一步。 显示英文摘要

摘要： We experimentally demonstrate hyperfine optical pumping of rubidium atoms probed by an evanescent electromagnetic field at a dielectric-vapor interface. This light-atom interaction at the nanoscale is investigated using a right angle prism integrated with a vapor cell and excited by evanescent wave under total internal reflection. An efficient hyperfine optical pumping, leading to a complete suppression of absorption on the probed evanescent signal, is observed when a pump laser beam is sent at normal incidence to the interface. In contrast, when the pump and probe beams are co-propagating in the integrated prism-vapor cell, no clear evidence of optical pumping is observed. The experimental results are supported by a detailed model based on optical Bloch equation of a four atomic levels structure. The obtained on-chip highly efficient optical pumping at the nanoscale is regarded as an important step in the quest for applications such as optical switching, magnetometry and quantum memory.