科研之友
微信
新浪微博
Facebook
分享链接
摘要
The use of a hollow light beam reduces the loss of atoms inside and outside an evanescent-light funnel. Therefore, we superimpose an LG(01) beam with a small hole onto a doughnut beam with a large outer diameter and couple the resultant hollow light beam to the 240-mu m-wide outlet of an inverted trigonal-pyramidal funnel. Compared to the case where a Gaussian light beam is employed for generation of evanescent light, the flux intensity of the output cold (87)Rb atoms rises 13-fold when the inner diameter of the 4.5-mm wide hollow light beam is 1.7 times as large as the size of the outlet under optimal blue-detuning conditions.
- 出版日期2011-11-1
