Optical properties of doped nanowires in external electric and magnetic fields

The impurity absorption of light in quantum wires in the presence of external electric and magnetic fields directed parallel to each other and perpendicular to the axis of the nanowire is studied theoretically. Impurities doped in a quantum wire are modeled by a zero-range potential. Expressions are obtained for the light absorption coefficient and the features of impurity absorption of light are studied for all possible directions of polarization of the light wave. In particular, in the presence of external fields, some optical transitions, which are forbidden in the absence of fields, become allowed. The frequency dependences of the light absorption coefficient and the influence of electric and magnetic fields on the value of the impurity light absorption coefficient are investigated. The possibility of controlling the optical characteristics of nanowires using an electric field is shown.