Observation of a Giant Goos-Hänchen Shift for Matter Waves

McKay, Samuel; de Haan, Victor O.; Leiner, Jon; Parnell, Steven R.; Dalgliesh, Robert M.; Boeni, Peter; Bannenberg, Lars J.; Le Thien, Q.; Baxter, David V.; Ortiz, Gerardo; Pynn, Roger

doi:10.1103/physrevlett.134.093803

Observation of a Giant Goos-Hänchen Shift for Matter Waves

Journal Article · Wed Mar 05 00:00:00 EST 2025 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.134.093803· OSTI ID:2538181

^[1]; ^[2]; ^[3]; Parnell, Steven R. ^[4]; Dalgliesh, Robert M. ^[5]; ^[6]; ^[7]; Le Thien, Q. ^[1]; ^[1]; ^[8]; ^[9]

Indiana University, Bloomington, IN (United States)
BonPhysics Research and Investigations BV, Puttershoek (The Netherlands)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Delft University of Technology (The Netherlands); Rutherford Appleton Laboratory, Oxfordshire (United Kingdom)
Rutherford Appleton Laboratory, Oxfordshire (United Kingdom)
Technical University of Munich, Garching (Germany); SwissNeutronics AG, Klingnau (Switzerland)
Delft University of Technology (The Netherlands)
Indiana University, Bloomington, IN (United States); Institute for Advanced Study, Princeton, NJ (United States); University of Waterloo, ON (Canada)
Indiana University, Bloomington, IN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

The Goos-Hänchen (GH) shift describes a phenomenon in which a specularly reflected beam is translated along the reflecting surface such that the incident and reflected rays no longer intersect at the surface. Using a neutron spin-echo technique and a specially designed magnetic multilayer mirror, we have measured the relative phase between the reflected up and down neutron spin states in total reflection. The relative GH shift calculated from this phase shows a strong resonant enhancement at a particular incident neutron wave vector, which is due to a waveguiding effect in one of the magnetic layers. Calculations based on the observed phase difference between the neutron states indicate a propagation distance along the waveguide layer of 0.65 mm for the spin-down state, which we identify with the magnitude of the giant GH shift. The existence of a physical GH shift is confirmed by the observation of neutron absorption in the waveguide layer. Here, we propose ways in which our experimental method may be exploited for neutron quantum-enhanced sensing of thin magnetic layers.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2538181

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 134; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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