104
4 Nonlinear Optics with Zero-Index Metamaterials
0
1
2
3
0
0.5
1
Fundamental
-0.5
0
0.5
1
0
1
2
3
0
0.5
1
Second Harmonic
-0.5
0
0.5
Fig. 4.13 Second-harmonic generation with perfect phase matching, according to Armstrong et al.
Fig. 4.14 Second-harmonic
generation with imperfect
phase matching, according to
Armstrong et al.
0
1
2
3
4
0
0.2
0.4
0.6
0.8
1
s = 25
s = 10
s = 2
s = 0
is that the individual propagation constants k 1 (=n 1 k 0 ) and k 2 (=n 2 k 0 ) get diminished
on account of close to zero values of n 1 and n 2 , and consequently gets diminished too. The effectiveness of zero-index media in boosting the second-harmonic
generation has been discussed in the next section in detail.