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Time evolution of Kerr rotation for (Ga,Mn)As excited by linearly polarized and circularly polarized ( and ) light at 8 K without external magnetic field.
Spin relaxation time as a function of temperature with pump intensity of 8 mW (a) and as a function of pump intensity at (b).
Magneto-optical Kerr rotation signals under different temperatures with external magnetic field of 1 T for (Ga,Mn)As. The intensities of pump and probe beam were 0.75 and 7.5 mW, respectively. For an easier overview, the curves are shifted vertically.
Temperature dependence of amplitude (a), dephasing time, (c) and precession frequency (e) measured at pump intensity of 7.5 mW. Pump intensity dependence of amplitude (b), dephasing time, (d) and precession frequency (f) measured at .
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