  We consider the evaporation of rotating micro black holes produced in highly
energetic particle collisions, taking into account the polarization due to the
coupling between the spin of the emitted particles and the angular momentum of
the black hole. The effect of rotation shows up in the helicity dependent
angular distribution significantly. By using this effect, there is a
possibility to determine the axis of rotation for each black hole formed,
suggesting a way to improve the statistics. Deviation from thermal spectrum is
also a signature of rotation. This deviation is due to the fact that rapidly
rotating holes have an effective temperature $T_{\rm eff}$ significantly higher
than the Hawking temperature $T_H$. The deformation of the spectral shape
becomes evident only for very rapidly rotating cases. We show that, since the
spectrum follows a blackbody profile with an effective temperature, it is
difficult to determine both the number of extra-dimensions and the rotation
parameter from the energy spectrum alone. We argue that the helicity dependent
angular distribution may provide a way to resolve this degeneracy. We
illustrate the above results for the case of fermions.

High Energy Physics - Phenomenology;Astrophysics;General Relativity and Quantum Cosmology;High Energy Physics - Theory