Atomic trapping and guiding by quasi-dark hollow beams

作者：Wang ZY; Dong YM; Lin Q^*

来源：Journal of Optics A: Pure and Applied Optics , 2005, 7(3): 147-153.

DOI：10.1088/1464-4258/7/3/009

• atom trapping
• atom guiding
• quasi-dark hollow beam

A theoretical investigation of atomic trapping and guiding by quasi-dark hollow beams is presented in this paper. By quasi-dark hollow beams we refer to beams of which the axial intensity is lower than the surrounding intensity, but not equal to zero. A new theoretical model of quasi-dark hollow beams is applied, which is appropriate to describe some kinds of practical hollow beams. The dependences of the corresponding atom trap resolution, the maximum possible detuning, the trap darkness factor and the ensemble-averaged spontaneous photon scattering rate on the beam parameters are analysed in detail. The relations among optical beam waist size, guide distance, darkness ratio and minimum detuning are obtained. The results obtained can not only explain the existed trapping experiments, but also predict the requirements on the beam quality to achieve particular atomic trapping and guiding.

• 出版日期2005-3
• 单位浙江大学