Abstract

In this paper we propose a new design of a spin-dependent polarizer based on a quantum dot array coupled to leads. By lifting the spin degeneracy of the carriers in the quantum dots by means of a magnetic field, Fano and Dicke effects may be used as effective means to generate spin-polarized currents. A detailed analysis of the spin-dependent transmission and polarized current as a function of the applied magnetic field and gate voltages is carried out. © 2009 IOP Publishing Ltd.