0
50
100
150
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
time [fs]
l x
l L
l R
Angular momentum h
0
50
100
150
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
l x
l L
l R
time [fs]
Angular momentum
h
Angular momentum
h
0
50
100
150
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
l z
l L =l R
time [fs]
(a)
(b)
(c)
Fig. 4 Time dependence of
coherent angular momentum
created by π pulse laser
excitation, a for coherent
excited states ða þ b 1 Þ, b for
coherent excited states ða þ
b 2 Þ and c for coherent excited
states ðb 1 þ b 2 Þ. The same
laser pulses as those in Fig. 3
are used respectively
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