Spin Manipulation in One Dimensional Structures*

We have investigated electron injection, in GaAs, from a quasi one-dimensional region into a two-dimensional electron gas. The spin texture of the injected electron is obtained by measuring focussing and we find that a spin separation is observed which is dependent on the length of the one-dimensional injector, the role of spin-orbit coupling in the 2D region is found to be dependent on the degree of polarisation of the injected electrons. The magnitude of the 0.7 anomaly follows the degree of spin polarisation which can be manipulated by injector geometry.