Phase-space properties of magneto-optical traps utilising micro-fabricated gratings.
Phase-space properties of magneto-optical traps utilising micro-fabricated gratings.
复制标题
DOI：
10.1364/oe.23.008948
复制
发表时间：
2015-03
期刊：
影响因子：
3.8
通讯作者：
J. McGilligan;P. Griffin;E. Riis;A. S. Arnold
中科院分区：
文献类型：
--
作者：
J. McGilligan;P. Griffin;E. Riis;A. S. Arnold
我们已经使用衍射光栅来简化制作，并显着提高原子收集效率，磁光阱使用微制造光学。原子序数的增强主要是由于大面积（4cm(2)）浅蚀刻（~ 200nm）二元光栅芯片增加了光束捕获体积。在这里，我们使用（87）Rb对四种不同芯片几何形状的片上磁光阱温度和密度进行了详细的理论和实验研究，同时研究了MOT辐射压力不平衡对片上磁光阱的影响。在两个芯片上优化初始MOTs，我们获得了大原子序数（2×10(7)）和光学糖蜜后的亚多普勒温度（50 μK）。
We have used diffraction gratings to simplify the fabrication, and dramatically increase the atomic collection efficiency, of magneto-optical traps using micro-fabricated optics. The atom number enhancement was mainly due to the increased beam capture volume, afforded by the large area (4cm(2)) shallow etch (~ 200nm) binary grating chips. Here we provide a detailed theoretical and experimental investigation of the on-chip magneto-optical trap temperature and density in four different chip geometries using (87)Rb, whilst studying effects due to MOT radiation pressure imbalance. With optimal initial MOTs on two of the chips we obtain both large atom number (2×10(7)) and sub-Doppler temperatures (50 μK) after optical molasses.