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arXiv · 2111.14326

Quasi one-dimensional diffuse laser cooling of atoms

Jin-Yin Wan·Xin Wang·Xiao Zhang·Yan-Ling Meng·Wen-Li Wang·Yuan Sun·Liang Liu
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Abstract

We demonstrate experimentally the generation of one-dimensional cold gases of $^{87}$Rb atoms by diffuse laser cooling (DLC). A horizontal slender vacuum glass tube with length of 105~cm and diameter of 2~cm is used in our experiment. The diffuse laser light inside the tube, which is generated by multi-reflection of injected lasers, cools the background vapor atoms. With 250~mW of cooling light and 50~mW of repumping light, an evenly distributed meter-long profile of atom cloud is obtained. We observe a factor 4 improvement on the atomic OD for a typical cooling duration of 170~ms and a sub-Doppler atomic temperature of 25~$\mu$k. The maximum number of detected cold atoms remain constant for a free-fall duration of 30~ms. Such samples are ideal for many quantum optical experiments involving electromagnetically induced transparency, electronically highly excited (Rydberg) atoms and quantum precision measurements.

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Jin-Yin Wan, Xin Wang, Xiao Zhang, Yan-Ling Meng, Wen-Li Wang, Yuan Sun, Liang Liu. 2021-11-29. Quasi one-dimensional diffuse laser cooling of atoms. https://doi.org/10.1103/physreva.105.033110

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