DOE OSTI · 3367061
Topological shaping of vortex neutron beams using forked phase gratings
Abstract
Beams of light or matter that carry well-defined states of orbital angular momentum (OAM) are promising probes of topological and textured condensed matter systems such as magnetic skyrmions. Using spin-echo small-angle neutron scattering, a phase-sensitive technique that allows for a relatively low intensity beam, we demonstrate the production of vortex neutron beams from forked phase gratings of various topological charges. This type of interferometric verification of OAM we present here could be further extended to other platforms using probes that are similarly limited by the coherence and strength of the currently available sources.
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McKay, S. [Indiana University, Bloomington, IN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)], Parnell, Steven R. [Rutherford Appleton Laboratory, Oxfordshire (United Kingdom)], Dalgliesh, Marilyn [Rutherford Appleton Laboratory, Oxfordshire (United Kingdom)], Lavrik, Nickolay V. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000295435634), Kravchenko, Ivan [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000349995822), Le Thien, Q. [Indiana University, Bloomington, IN (United States)], Baxter, D. V. [Indiana University, Bloomington, IN (United States)], Ortiz, Gerardo [Indiana University, Bloomington, IN (United States)], Pynn, Roger [Indiana University, Bloomington, IN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)]. 2026-05-21. Topological shaping of vortex neutron beams using forked phase gratings. https://doi.org/10.1103/prnf-wtjp
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