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arXiv 1612.04583physics.atom-phcond-mat.quant-gasquant-ph
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在D2线上用拉曼灰色糖蜜进行40 K的亚多普勒激光冷却

Sub-Doppler laser cooling of 40K with Raman gray molasses on the D2 line

G. D. Bruce, E. Haller, B. Peaudecerf, D. A. Cotta, M. Andia, S. Wu, M. Y. H. Johnson, B. W. Lovett, S. Kuhr

摘要:

灰色糖蜜是亚多普勒激光冷却原子到低温的有力工具。对于碱性原子,这种技术通常是用冷却激光器实现的,这些激光器与D1或D2线蓝失谐。在这里,我们表明,有效的灰色糖蜜可以实现的D2线的40K与红失谐激光。我们获得了48(2)微开尔文的温度,这使得9.2(3)*10^6个原子能够从磁光阱直接加载到光偶极阱中。我们支持我们的研究结果的一维模型和三维数值模拟的光学布洛赫方程,定性再现实验观察到的冷却效果。

英文摘要:

Gray molasses is a powerful tool for sub-Doppler laser cooling of atoms to low temperatures. For alkaline atoms, this technique is commonly implemented with cooling lasers which are blue-detuned from either the D1 or D2 line. Here we show that efficient gray molasses can be implemented on the D2 line of 40K with red-detuned lasers. We obtained temperatures of 48(2) microKelvin, which enables direct loading of 9.2(3)*10^6 atoms from a magneto-optical trap into an optical dipole trap. We support our findings by a one-dimensional model and three-dimensional numerical simulations of the optical Bloch equations which qualitatively reproduce the experimentally observed cooling effects.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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