摘要We report experimental demonstration of a magneto-optical trap (MOT) of Rb atoms with a high optical density. With 2.2-cm-diameter cooling laser beams, we achieve an optical density of nearly 11 for about 2.6×1010 trapped Rb atoms with the beam intensity of about 6.6mW/cm2 per beam. The temperature of the cold atoms is about 250μK. Furthermore, by ramping the magnetic field gradient from 8G/cm to about 20G/cm, the atomic cloud in the MOT is compressed and the optical density is up to 16.
Abstract：We report experimental demonstration of a magneto-optical trap (MOT) of Rb atoms with a high optical density. With 2.2-cm-diameter cooling laser beams, we achieve an optical density of nearly 11 for about 2.6×1010 trapped Rb atoms with the beam intensity of about 6.6mW/cm2 per beam. The temperature of the cold atoms is about 250μK. Furthermore, by ramping the magnetic field gradient from 8G/cm to about 20G/cm, the atomic cloud in the MOT is compressed and the optical density is up to 16.
HAN Yan-Xu;LIU Yong-Hong;ZHANG Chun-Hong;LI Shu-Jing;WANG Hai. Realization of High Optical Density Rb Magneto-optical Trap[J]. 中国物理快报, 2009, 26(2): 23201-023201.
HAN Yan-Xu, LIU Yong-Hong, ZHANG Chun-Hong, LI Shu-Jing, WANG Hai. Realization of High Optical Density Rb Magneto-optical Trap. Chin. Phys. Lett., 2009, 26(2): 23201-023201.
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