%0 Journal Article %T All-angle phase matching condition and backward second-harmonic localization in nonlinear photonic crystals %+ Groupe d'étude des semiconducteurs (GES) %A Centeno, Emmanuel %A Felbacq, Didier %A Cassagne, David %< avec comité de lecture %Z 07-057 %@ 0031-9007 %J Physical Review Letters %I American Physical Society %V 98 %P 263903 %8 2007 %D 2007 %R 10.1103/PhysRevLett.98.263903 %K GENERATION %K GAN %Z Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]Journal articles %X 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. %G English %L hal-00437532 %U https://hal.science/hal-00437532 %~ CNRS %~ UNIV-MONTP2 %~ GES %~ UNIV-MONTPELLIER %~ UM1-UM2