Phys. Rev. Lett. 98, 263903 (2007) [4 pages]All-Angle Phase Matching Condition and Backward Second-Harmonic Localization in Nonlinear Photonic CrystalsReceived 7 September 2006; published 29 June 2007 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. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.263903
DOI:
10.1103/PhysRevLett.98.263903
PACS:
42.70.Qs, 42.65.Ky
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