TY - JOUR
T1 - Generation and characterization of focused helical x-ray beams
AU - Loetgering, Lars
AU - Baluktsian, Margarita
AU - Keskinbora, Kahraman
AU - Horstmeyer, Roarke
AU - Wilhein, Thomas
AU - Schütz, Gisela
AU - Eikema, Kjeld S.E.
AU - Witte, Stefan
N1 - Publisher Copyright:
Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
PY - 2020
Y1 - 2020
N2 - The phenomenon of orbital angular momentum (OAM) affects a variety of important applications in visible optics, including optical tweezers, free-space communication, and 3D localization for fluorescence imaging. The lack of suitable wavefront shaping optics such as spatial light modulators has inhibited the ability to impart OAM on x-ray and electron radiation in a controlled way. Here, we report the experimental observation of helical soft x-ray beams generated by holographically designed diffractive optical elements. We demonstrate that these beams rotate as a function of propagation distance and measure their vorticity and coherent mode structure using ptychography. Our results establish an approach for controlling and shaping of complex focused beams for short wavelength scanning microscopy and OAM-driven applications.
AB - The phenomenon of orbital angular momentum (OAM) affects a variety of important applications in visible optics, including optical tweezers, free-space communication, and 3D localization for fluorescence imaging. The lack of suitable wavefront shaping optics such as spatial light modulators has inhibited the ability to impart OAM on x-ray and electron radiation in a controlled way. Here, we report the experimental observation of helical soft x-ray beams generated by holographically designed diffractive optical elements. We demonstrate that these beams rotate as a function of propagation distance and measure their vorticity and coherent mode structure using ptychography. Our results establish an approach for controlling and shaping of complex focused beams for short wavelength scanning microscopy and OAM-driven applications.
UR - http://www.scopus.com/inward/record.url?scp=85079593389&partnerID=8YFLogxK
U2 - 10.1126/sciadv.aax8836
DO - 10.1126/sciadv.aax8836
M3 - Article
C2 - 32110725
AN - SCOPUS:85079593389
SN - 2375-2548
VL - 6
JO - Science Advances
JF - Science Advances
IS - 7
M1 - eaax8836
ER -