arXiv 2102.135462021-02-26quant-phphysics.atom-phphysics.optics

用于散射成导光模的布拉格条件

Bragg condition for scattering into a guided optical mode

B. Olmos, C. Liedl, I. Lesanovsky, P. Schneeweiss

备注：: 6 pages, 3 figures
DOI：: 10.1103/PhysRevA.104.043517

摘要：

我们从理论上研究了从原子阵列到波导导模的光散射。我们表明，散射的平面波激光场到波导模式的角度偏离几何布拉格角显着增强。我们导出了一个修正的布拉格条件，并表明它是由被引导的光与原子之间的色散相互作用引起的。此外，我们确定了各种参数制度中的散射率的特点是一个定性不同的依赖于原子数，如线性，二次，振荡或常数的行为。我们表明，我们的研究结果是强大的原子阵列中的空隙，促进他们的实验观察和潜在的应用。我们的工作为集体光散射以及几何形状和相互作用效应之间的相互作用提供了新的见解，其影响超出了光学领域。

英文摘要：

We theoretically investigate light scattering from an array of atoms into the guided modes of a waveguide. We show that the scattering of a plane wave laser field into the waveguide modes is dramatically enhanced for angles that deviate from the geometric Bragg angle. We derive a modified Bragg condition, and show that it arises from the dispersive interactions between the guided light and the atoms. Moreover, we identify various parameter regimes in which the scattering rate features a qualitatively different dependence on the atom number, such as linear, quadratic, oscillatory or constant behavior. We show that our findings are robust against voids in the atomic array, facilitating their experimental observation and potential applications. Our work sheds new light on collective light scattering and the interplay between geometry and interaction effects, with implications reaching beyond the optical domain.

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英文摘要：

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