  In this work we investigated the InAs/InAlAs quantum wires (QWRs)
superlattice by optically exciting the structure with near-infrared radiation.
By varying the helicity of the radiation at room temperature we observed the
circular photogalvanic effect related to the $C_{2v}$ symmetry of the
structure, which could be attributed to the formation of a quasi
two-dimensional system underlying in the vicinity of the QWRs pattern. The
ratio of Rashba and Dresselhaus terms shows an evolution of the spin-orbit
interaction in quasi two-dimensional structure with the QWR layer deposition
thickness.
