Figure 3.
Transverse spin () and the spin-orbit locking in an ENG/MNG waveguide. For the spin-up , the wave-vector or momentum in the MNG (ENG) metamaterial is positive (negative). However, for the spin-down , the momentum in the MNG (ENG) metamaterial is negative (positive). The 2D magnetic-field distributions in the z direction at frequency of 2.7 GHz for rotating source with different handedness located in ENG or MNG metamaterial are shown in the four insets.