  The inverse Faraday effect induced in magnetic films by ultrashort laser
pulses allows excitation and control of spins at GHz and sub-THz frequencies.
Frequency of the excited magnetization precession is easily tunable by the
external magnetic field. On the other hand, phase of the precession hardly
depends on magnetic field. Here we demonstrate an approach for the control of
the precession phase by variation of the incidence angle of the laser pulses.
In particular, theoretical consideration states that the phase increases with
increase of the incidence angle and for small angles this relation is a direct
proportionality. Experimental studies confirm this conclusion and provide shift
of phase by about 4 deg. for the declination of the incidence angle by 15 deg.
from the normal. This study provides a simple way for additional manipulation
with optically excited magnetization dynamics, which is of importance for
different spintronic applications.
