  We propose a method to read-out the spin-state of an electron in a quantum
dot in a Voigt geometry magnetic field using cycling transitions induced by the
AC Stark effect. We show that cycling transitions can be made possible by a
red-detuned, circularly-polarized laser, which modifies the spin eigenstates
and polarization selection rules via the AC Stark effect. A Floquet-Liouville
supermatrix approach is used to calculate the time-evolution of the density
matrix under the experimental conditions of a spin read-out operation. With an
overall detection efficiency of 2.5%, the read-out is a single-shot measurement
with a fidelity of 76.2%.
