Optimal geometry of atom funnels with surface-plasmon enhanced evanescent light field
作者： Kenta Sagawa , Takahiro Yoshida , Haruhiko Ito
DOI: 10.1016/J.OPTCOM.2015.05.009
关键词: Optics 、 Circular polarization 、 Conical surface 、 Surface plasmon 、 Light beam 、 Reflection (physics) 、 Materials science 、 Intensity (heat transfer) 、 Light field 、 Funnel
摘要: Abstract We enhance the evanescent light field for funneling cold atoms by surface-plasmon resonance. When a 780.2-nm beam is incident on glass–gold interface from glass side at an angle of 44.6°, intensity rises 14.4-fold p-polarization and 7.2-fold circular polarization compared to case with total-internal reflection. Then, we evaluate flux resultant Rb atomic three funnel shapes cone, quadrangular pyramid, triangular pyramid. Monte Carlo simulations show that exceeds 1 atom / nm 2 s when outlet diameter smaller than 10 μ m . In particular, conical yields highest polarization. Also, there optimal outside hollow generating given power. A prototype fabricated 3D printer.
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