空心金属光纤导引原子和Monte-Carlo模拟

摘要

At first,the distributions of the electromagnetic field and the optical intensity are calculated for the TE01 mode in hollow metallic optical fiber.Then,taking 85Rb atom as an example,the optical potential between 85Rb atom and TE01 mode is calculated,and the study results show that the TE01 mode is basically distributed in the hollow region of the metallic optical fiber,i.e.it is circularly distributed along the fiber cross section.Finally,the guiding efficiencies of the straight guide and the bent guide in the hollow metallic optical fiber are simulated respectively by Monte-Carlo method,which show that the guiding efficiency by the bent scheme is obviously lower than that by the straight scheme.The characteristics of the bent guiding scheme show that the atomic guiding in hollow metallic optical fiber not only can be used in atom interference,but also can be used as a velocity measurement instrument based on a circular hollow metallic optical fiber.%在空心金属光纤,首先计算了TE01模的电磁场分布和光强分布.其次以85Rb原子为例,计算了TE01模和85Rb原子相互作用的光学势.研究表明,TE01模在空心金属光纤中集中分布在空心区,沿光纤截面呈环状分布.最后采用Monte-Carlo方法,分别模拟了原子在直空心金属光纤和弯曲空心金属光纤中的直导引效率和弯曲导引效率,相比直导引方案,弯曲导引方案效率明显偏低.空心金属光纤原子导引不仅可用于原子干涉仪研究,采用环形空心金属光纤的原子导引还可用于角速度测量研究.