采用四根单模光纤束实现消逝波原子(或分子)波导的理论分析

提出了一种利用四根亚微米单模光纤束实现冷原子(或冷分子)波导的新方案，计算了四光纤束内空心区域的消逝波光场及其光学囚禁势.研究表明这种蓝失谐的空心消逝波光场同样可用于实现冷原子(或冷分子)的激光波导，而且与传统的中空光纤原子波导方案相比，不仅简单方便，造价低廉，而且更容易实现冷原子物质波的高效单模波导.关键词：单模光纤消逝波原子(或分子)波导

Theoretical analysis of evanescent-wave atomic (molecular) guide using a bundle of four single-mode optical fibers

In this paper, we propose a new scheme to guide cold atoms (or cold molecules) using a bundle of four single-mode optical fibers with a sub-micrometer size, and calculate the evanescent-wave field in the hollow region of four-fiber bundle and its optical potential for ⁸⁵Rb atoms. Our study shows that such a blue-detuned hollow evanescent-wave field can also be used to realize the laser waveguide of cold atoms (or cold molecules), and, compared with the traditional atomic guiding scheme using a hollow optical fiber, our scheme is not only simple and cheap, but also easier to realize the single-mode waveguide of cold atomic matter-wave with high efficiency.