Manipulating the spin texture in a spin-orbit superlattice by terahertz radiation

The spin texture in a gate-controlled one-dimensional superlattice with Rashba spin-orbit coupling is studied in the presence of external terahertz radiation causing the superlattice miniband transitions. It is shown that the local distribution of the excited spin density can be modified by varying the Fermi level of the electron gas and by changing the radiation intensity and polarization, allowing the controlled coupling of spins and photons.