Microtrap on a concave grating reflector for atom trapping
Microtrap on a concave grating reflector for atom trapping
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DOI：
10.1088/1674-1056/25/8/087802
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发表时间：
2016-06
影响因子：
1.7
通讯作者：
Hui Zhang;Tao Li;Yaling Yin;Xingjia Li;Yong Xia;J. Yin
中科院分区：
文献类型：
--
作者：
Hui Zhang;Tao Li;Yaling Yin;Xingjia Li;Yong Xia;J. Yin
We propose a novel scheme of optical confinement for atoms by using a concave grating reflector. The two-dimension grating structure with a concave surface shape exhibits strong focusing ability under radially polarized illumination. Especially, the light intensity at the focal point is about 100 times higher than that of the incident light. Such a focusing optical field reflected from the curved grating structure can provide a deep potential to trap cold atoms. We discuss the feasibility of the structure serving as an optical dipole trap. Our results are as follows. (i) Van der Waals attraction potential to the surface of the structure has a low effect on trapped atoms. (ii) The maximum trapping potential is ~ 1.14 mK in the optical trap, which is high enough to trap cold 87Rb atoms from a standard magneto-optical trap with a temperature of 120 μK, and the maximum photon scattering rate is lower than 1/s. (iii) Such a microtrap array can also manipulate and control cold molecules, or microscopic particles.
