Holographic method for site-resolved detection of a 2D array of ultracold atoms
Holographic method for site-resolved detection of a 2D array of ultracold atoms
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用于超冷原子二维阵列位点分辨检测的全息方法
DOI:
10.1007/s00340-016-6501-1
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
J. Hecker Denschlag
中科院分区:
文献类型:
--
作者:
D.K. Hoffmann;B. Deissler;W. Limmer;J. Hecker Denschlag
We propose a novel approach to site-resolved detection of a 2D gas of ultracold atoms in an optical lattice. A near-resonant laser beam is coherently scattered by the atomic array, and after passing a lens its interference pattern is holographically recorded by superimposing it with a reference laser beam on a CCD chip. Fourier transformation of the recorded intensity pattern reconstructs the atomic distribution in the lattice with single-site resolution. The holographic detection method requires only about two hundred scattered photons per atom in order to achieve a high reconstruction fidelity of 99.9 %. Therefore, additional cooling during detection might not be necessary even for light atomic elements such as lithium. Furthermore, first investigations suggest that small aberrations of the lens can be post-corrected in imaging processing.
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