[19a-S622-1~13] 3.12 Nanoscale optical science and near-field optics

△ [19a-S622-4] High efficient coupling of a pseudo Bessel hollow light beam to an evanescent-light atom funnel

〇Kazuma Horita¹, Kei Hagihara¹, Haruhiko Ito¹ (1.Titech)

Keywords:atomic funnel,cold atomic beam

We generate a high flux atomic beam by an atomic funnel with evanescent light but a leaked light of hollow beam interfere that atoms exit from opening. We improved these problems to introduce a hollow beam generated through a pair of axicon lenses and a 3D printed hollow beam coupler. In consequence, We investigated 55% of coupling efficiency. According to Monte Carlo method, It is expected that the flux intensity of atomic beam would reach 3×10¹¹ atom/cm²s.