
95Self-Focusing and Nonlinear Effects
Chapter 4
3210–1–2–3
9
9.1
9.2
9.3
9.4
9.5
9.6
9.7
Normalized quasimomentum px
(a)
Energy (eV)
I =0.0 W/cm
2
I =2.0 TW/cm
2
I =8.94 TW/cm
2
I =17.6 TW/cm
2
Laser
wavelength
800 nm
321
Normalized quasimomentum x(b)
0–1–2–3
10
Energy (eV)
12
14
16
18
20
I =0.0 W/cm
2
I =8.94 TW/cm
2
I =2.0 TW/cm
2
I =17.6 TW/cm
2
I = 0.0 W/cm
2
I = 2.0 W/cm
2
I = 8.94 TW/cm
2
I = 17.6 TW/cm
2
Normalized quasimomentum x
3210–1–2–3
10
12
14
16
18
Laser
wavelength
800 nm
FIGURE 4.8 Variations of eective bands with the increase of laser intensity for the dispersion relations
listed in Table 4.1: (a) cosine relation, (b) parabolic relation, (c) Kane-type relation. Las