Figure 1
From: Long-range non-diffusive spin transfer in a Hall insulator
Visualization of spin propagation. (a) 2D single-electron energy states in magnetic field. Two red arrows indicate the allowed optical transitions resulting in the resonant reflection which is used to monitor spin system. (b) Principle of optical pump-probe method applied to detect spin propagation. The signal of resonant reflectance arises as soon as the spin excitations appear within the broad area illuminated by resonant probe laser beam. (c) Simplified scheme of experimental setup for visualization of spin propagation.
