论文标题
多波长相干衍射成像
Multi-wavelength coherent diffractive imaging
论文作者
论文摘要
连贯的衍射成像是一种通过数值颠倒其衍射模式来恢复样品图像的技术。我们提出了该方法的概括，以逆转多波长数据。使用这种方法，我们表明可以从单个多色衍射模式中恢复每个波长的单独重建。通过将约束比适应多色情况的限制是对波长数量的限制。该方法的性能被证明是源光谱，出口波内复杂性的函数以及使用多个数值模拟的样品几何形状的函数。最后，一个示例显示了使用从高阶谐波生成源中选择的两个谐波恢复特定于元素信息的能力。
Coherent diffractive imaging is a technique that recovers the sample image by numerically inverting its diffraction pattern. We propose a generalization of this method for the inversion of multi-wavelength data. Using this approach, we show that separate reconstructions for each wavelength can be recovered from a single polychromatic diffraction pattern. Limitations on the number of wavelengths is provided by adapting the constraint ratio to the polychromatic situation. The method's performance is demonstrated as a function of the source spectrum, the degree of complexity within the exit wave and the sample geometry using several numerical simulations. Lastly, an example shows the ability to recover element-specific information using two harmonics selected from a high-order harmonic generation source.
