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arXiv physics/9806019physics.atom-phphysics.optics
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原子光学中的高分辨率振幅和相位光栅

High resolution amplitude and phase gratings in atom optics

P. R. Berman, B. Dubetsky, J. L. Cohen

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11 pages, 14 figures
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摘要：

选择原子-场几何形状，其中原子束穿过由三个场组成的场相互作用区，一个场具有在$\hat{z}$方向上传播的频率$Ω=c/λ$，另两个场具有在- $\hat{z}$方向上传播的频率$Ω+δ_{1}$和$Ω+δ_{2}$。对于$n_{1}δ_{1}+n_{2}δ_{2}=0$和$|δ_{1}| T,|δ_{2}| T\gg 1$，其中$n_{1}$和$n_{2}$是正整数，并且$T$是原子静止帧中的脉冲持续时间，原子-场相互作用导致具有周期$% λ/[2(n_{1}+n_{2})]$的原子振幅和相位光栅的创建。以这种方式，可以使用具有波长$λ$的光场来产生周期性远小于$λ$的原子光栅。

英文摘要：

An atom-field geometry is chosen in which an atomic beam traverses a field interaction zone consisting of three fields, one having frequency $Ω=c/λ$ propagating in the $\hat{z}$ direction and the other two having frequencies $Ω+δ_{1}$ and $Ω+δ_{2}$ propagating in the -$\hat{z}$ direction. For $n_{1}δ_{1}+n_{2}δ_{2}=0$ and $|δ_{1}| T,|δ_{2}| T\gg 1$, where $n_{1}$ and $n_{2}$ are positive integers and $T$ is the pulse duration in the atomic rest frame, the atom-field interaction results in the creation of atom amplitude and phase gratings having period $% λ/[2(n_{1}+n_{2})]$. In this manner, one can use optical fields having wavelength $λ$ to produce atom gratings having periodicity much less than $λ$.

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