一种新颖的表面光波导型原子(或分子)分束器

A novel beam-splitter for surface wave-guided atoms or molecules

提出了一种采用二元π位相板与柱面透镜组合而构成表面光波导型原子(或分子)分束器及其Mach_Zehnder干涉仪与X_分束器列阵的新方案,介绍了本方案的物理思想与基本原理,导出了光强分布、强度梯度、分束距离和分束路径的宽度与光学系统参数间的解析关系,并分析和讨论了本方案的潜在应用及其可行性.研究表明,本方案设计新颖、光路简单,便于与其他元件组合构成具有表面微结构的集成原子(或分子)光学元器件及其全光型原子(或分子)芯片.

We propose a new scheme to form a surface Y- or X-shaped beam splitter for optically wave-guided atoms （or molecules） and its Mach-Zehnder interferometer by using the combination of a binary π phase plate and a micro-cylindrical lens. The physics idea and basic principle of our beam splitter are introduced, and the analytic relationships between the intensity distribution （or the intensity gradient, or the splitting distance, and splitting-path width） and the parameters of our optical system are derived and discussed. The potential applications of the beam splitter and its experimental feasibility are discussed. Our study shows that the design is novel and the scheme is simple, and it can be used to construct various integrated atom- （ or molecule-） optical elements with surface micro-structures, and even to form some all-optically integrated atom （or molecular） chips.