论文标题
在光栅磁陷阱中限制碱 - 地球元件
Confinement of an alkaline-earth element in a grating magneto-optical trap
论文作者
论文摘要
我们使用纳米制动的衍射光栅芯片展示了碱 - 地原子的紧凑磁磁陷阱（MOT）。单个输入激光梁，具有宽$^1 $ s $ _0 \，\ rightArrow \，^1 $ p $ _1 $的均匀的跨质质量过渡，形成了MOT与从刺激芯片和永久磁场产生的磁场的三个衍射光束结合使用。差分抽水管限制了加热的，充满激烈的源对捕获区域背景压力的影响。该系统的总体积约为2.4L。在我们的设置后，我们已将$ 5 \ times 10^6 $ $^{88} $ SR原子捕获，温度约为$ 6 $ MK，并且捕获寿命约为1 s。我们的结果将有助于将基于碱 - 地球原子的光学原子时钟和其他量子技术微型化。
We demonstrate a compact magneto-optical trap (MOT) of alkaline-earth atoms using a nanofabricated diffraction grating chip. A single input laser beam, resonant with the broad $^1$S$_0\,\rightarrow \,^1$P$_1$ transition of strontium, forms the MOT in combination with three diffracted beams from the grating chip and a magnetic field produced by permanent magnets. A differential pumping tube limits the effect of the heated, effusive source on the background pressure in the trapping region. The system has a total volume of around 2.4 L. With our setup, we have trapped up to $5 \times 10^6$ $^{88}$Sr atoms, at a temperature of approximately $6$ mK, and with a trap lifetime of approximately 1 s. Our results will aid the effort to miniaturize optical atomic clocks and other quantum technologies based on alkaline-earth atoms.
