Ptychographic amplitude and phase reconstruction of bichromatic vortex beams

Author
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 of Publication
2018
Journal
Optics Express
Volume
26
Number of Pages
34007-34015
Date Published
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
JILA PI
Journal Article