Multi-wavelength coherent diffractive imaging
Abstract
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.
Cite
@article{arxiv.2005.03336,
title = {Multi-wavelength coherent diffractive imaging},
author = {Erik Malm and Edwin Fohtung and Anders Mikkelsen},
journal= {arXiv preprint arXiv:2005.03336},
year = {2020}
}