  We consider the current induced in a quantum wire by external electromagnetic
radiation. The photocurrent is caused by the interplay of spin-orbit
interaction (Rashba and Dresselhaus terms) and external in-plane magnetic
field. We calculate this current using a Wigner functions approach taking into
account radiation-induced transitions between transverse subbands. The
magnitude and the direction of the current depend on the Dresselhaus and Rashba
constants, strength of magnetic field, radiation frequency and intensity. The
current can be controlled by changing some of these parameters.
