All-angle phase matching condition and backward second-harmonic localization in nonlinear photonic crystals.
We demonstrate an isotropic phase matching in properly designed nonlinear two-dimensional photonic crystals. In addition, by combining left- and right-handed properties at the fundamental and second-harmonic frequencies, we obtain a backward second-harmonic generation. These two properties lead to an unusual second-harmonic localization effect in perfect lattice photonic crystals.
Centeno
Emmanuel
E
GES UMR-CNRS 5650 Université Montpellier II, Place E. Bataillon, CC074, 34095 Montpellier, France.
Felbacq
Didier
D
Cassagne
David
D