Atomic diffraction by a laser standing wave: Analysis using Bloch states
Atomic diffraction by a laser standing wave: Analysis using Bloch states
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激光驻波的原子衍射：使用布洛赫态进行分析
DOI：
10.1007/s100530170276
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
J. Vigué
中科院分区：
文献类型：
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作者：
C. Champenois;M. Büchner;R. Delhuille;R. Mathevet;C. Robilliard;C. Rizzo;J. Vigué
摘要：激光驻波的原子衍射通常用于构建原子干涉仪的镜子和分束器。这种衍射过程的许多方面都很好理解，但很难获得该过程的统一视图，因为它通常以几种近似的方式进行描述。我们想在这里表明，受光学启发并使用激光驻波内原子波的精确布洛赫描述的描述是通过单一形式主义描述各种状态的教程方法。为了得到衍射振幅的简单解析表达式，我们考虑具有平坦横向轮廓的驻波强度。然后将所得衍射强度的一般表达式与拉曼-纳斯极限和布拉格体系中的可用分析公式进行比较。我们认为这种形式主义可以有效地扩展到研究许多重要问题。
Abstract:Atomic diffraction by a laser stationary wave is commonly used to build mirrors and beam splitters for atomic interferometers. Many aspects of this diffraction process are well understood but it is difficult to get an unified view of this process because it is commonly described in several approximate ways. We want to show here that a description inspired by optics and using the exact Bloch description of the atomic wave inside the laser standing wave is a tutorial way of describing the various regimes by a single formalism. In order to get simple analytic expressions of the diffraction amplitudes, we consider a standing wave intensity with a flat transverse profile. The resulting general expression of the diffraction intensities is then compared to available analytical formulae in the Raman-Nath limit and in the Bragg regime. We think that this formalism can be fruitfully extended to study many important questions.