@article{11766,
  keywords = {hyperspectral fields, orbital angular momentum},
  author = {Yuka Esashi and C.-T. Liao and B. Wang and Nathan Brooks and Kevin Dorney and Carlos Hernández-García and Henry Kapteyn and D. Adams and Margaret Murnane},
  title = {Ptychographic amplitude and phase reconstruction of bichromatic vortex beams},
  abstract = {<p>We experimentally demonstrate that ptychographic coherent diffractive imaging can be used to simultaneously characterize the amplitude and phase of bichromatic orbital angular momenta-shaped vortex beams, which consist of a fundamental field, together with its copropagating second-harmonic field. In contrast to most other orbital angular momentum characterization methods, this approach solves for the complex field of a hyperspectral beam. This technique can also be used to characterize other phase-structured illumination beams, and, in the future, will be able to be extended to other complex fields in the extreme ultraviolet or X-ray spectral regions, as well as to matter waves.</p>},
  year = {2018},
  journal = {Optics Express},
  volume = {26},
  pages = {34007-34015},
  month = {2018-12},
  url = {https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-26-26-34007\&id=403120$\#$sec1-3},
  doi = {10.1364/OE.26.034007},
}