  We describe a scheme of deterministic single-photon subtraction in a
solid-state system consisting of a charged quantum dot coupled to a bimodal
photonic-crystal cavity with a moderate magnetic field applied in a Voigt
configuration. We numerically simulate injection of optical pulses into one of
the modes of the bimodal cavity and show that the system deterministically
transfers one photon into the second cavity mode for input pulses in the form
of both Fock states and coherent states.
