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arXiv 1007.4425physics.atom-phquant-ph
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原子扩散对空间有界laser场中暗共振线型的影响

Influence of diffusion of atoms on the dark resonance lineshape in spatially bounded laser fields

V. I. Romanenko, A. V. Romanenko, L. P. Yatsenko

摘要:

我们提出了一个扩散模型,最近发现的扩散引起的Ramsey窄化时,原子扩散的缓冲气体细胞在激光辐射场。在强碰撞近似下,得到了原子与光场相互作用的三能级模型中,不同频率激光辐射下亚稳态与激发态耦合的相干性扩散方程.的形状的吸收线附近的传输最大值的频率之一的双光子共振失谐的细胞的各种几何形状的依赖关系进行了研究。

英文摘要:

We propose a diffusion model for the recently discovered diffusion-induced Ramsey narrowing arising when atoms diffuse in a buffer-gas cell in the laser radiation field. The diffusion equation for the coherence of metastable states coupled with an excited state by laser radiation of different frequencies in a three-level scheme of the atom-field interaction is obtained in the strong-collision approximation. The dependence of the shape of an absorption line near the transmission maximum of one of the frequencies on the two-photon resonance detuning for various geometries of the cell is investigated.

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