  We propose and numerically simulate an optoelectronic compact circular
polarimeter. It allows to electrically measure the degree of circular
polarization and light intensity at room temperature for a wide range of
incidence angles in a single shot. The device, being based on GaAsN, is easy to
integrate into standard electronics and does not require bulky movable parts
nor extra detectors. Its operation hinges mainly on two phenomena: the spin
dependent capture of electrons and the hyperfine interaction between bound
electrons and nuclei on Ga$^{2+}$ paramagnetic centers in GaAsN. The first
phenomenon confers the device with sensitivity to the degree of circular
polarization and the latter allows to discriminate the handedness of the
incident light.
