论文标题
结构化梁不变到相干扩散
Structured beams invariant to coherent diffusion
论文作者
论文摘要
贝塞尔梁是广泛的非裂开（传播不变）田地的著名成员。我们报告了实验，表明非分裂场也不受扩散的影响。我们将结构化激光场的相位和大小映射到两个经历扩散的温暖原子的内部状态之间的空间相干性。我们通过从空间连贯性中连续产生光线来测量可控，有效的扩散时间之后的场。贝塞尔 - 高斯田地的相干扩散和更复杂的非裂开场进行了定量分析，并与衍射场直接进行了比较。为了阐明扩散不变性的起源，我们显示了我们变平的相位模式的非划分场的结果。
Bessel beams are renowned members of a wide family of non-diffracting (propagation-invariant) fields. We report on experiments showing that non-diffracting fields are also immune to diffusion. We map the phase and magnitude of structured laser fields onto the spatial coherence between two internal states of warm atoms undergoing diffusion. We measure the field after a controllable, effective, diffusion time by continuously generating light from the spatial coherence. The coherent diffusion of Bessel-Gaussian fields and more intricate, non-diffracting fields is quantitatively analyzed and directly compared to that of diffracting fields. To elucidate the origin of diffusion invariance, we show results for non-diffracting fields whose phase pattern we flatten.
