Small-angle scattering interferometry with neutron orbital angular momentum states
- State Univ. of New York (SUNY), Buffalo, NY (United States); Univ. of Waterloo, ON (Canada)
- Univ. of Waterloo, ON (Canada); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Univ. of Waterloo, ON (Canada)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- Heinz Maier-Leibnitz Zentrum, Garching (Germany)
Methods to prepare and characterize neutron helical waves carrying orbital angular momentum (OAM) were recently demonstrated at small-angle neutron scattering (SANS) facilities. These methods enable access to the neutron orbital degree of freedom which provides new avenues of exploration in fundamental science experiments as well as in material characterization applications. However, it remains a challenge to recover phase profiles from SANS measurements. We introduce and demonstrate a novel neutron interferometry technique for extracting phase information that is typically lost in SANS measurements. An array of reference beams, with complementary structured phase profiles, are put into a coherent superposition with the array of object beams, thereby manifesting the phase information in the far-field intensity profile. We demonstrate this by resolving petal-structure signatures of helical wave interference for the first time: an implementation of the long-sought recovery of phase information from small-angle scattering measurements.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- AC05-00OR22725; SC0023695
- OSTI ID:
- 2538416
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 15; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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