Evaluate
number
of
electrons
1
oscillator
strength
1
0
.
5
resonant
frequency
1
1
damping
factor
1
0
.
1
oscillator
strength
2
0
.
5
resonant
frequency
2
3
damping
factor
2
0
.
1
oscillator
strength
3
0
resonant
frequency
3
6
damping
factor
3
0
.
1
1
×
10
15
2
×
10
15
3
×
10
15
4
×
10
15
5
×
10
15
6
×
10
15
0
.
5
1
.
0
1
.
5
2
.
0
2
.
5
3
.
0
3
.
5
refractive
index
vs
.
frequency
1
×
10
15
2
×
10
15
3
×
10
15
4
×
10
15
5
×
10
15
6
×
10
15
0
.
2
0
.
4
0
.
6
extinction
coefficient
vs
.
frequency