Fig. 1 Standard Swaveguide Structure (IMAGE) Lomonosov Moscow State University Caption (a) Standard swaveguide structure consisting of reflective layers A and C and transparent layer B between them. (b,c) Magnetic waveguide structure consisting of three layers A, B (magnetic) and C on a substrate D. The red line shows the reflecting ability of the layers. The black line shows depth distribution of neutron density. Spin-up neutrons are trapped into the layer C, and spin-down neutrons into layer B Credit Yury Khaydukov Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.