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21 April 2008 Second harmonic localization in nonlinear photonic crystals
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We demonstrate an isotropic phase matching condition achieved in nonlinear 2D PhCs that suppresses the incident angle constraint [1]. In addition, we show a backward SH localization effect by combining this unusual all-angle phase matching and left-handed PhC properties. The SH emission is confined in a small area of dimension close to the pump wavelength without the introduction of defect lattices. An analytical model is proposed in order to explain this parametric localization mechanism.
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E. Centeno, C. Ciraci, D. Felbacq, and D. Cassagne "Second harmonic localization in nonlinear photonic crystals", Proc. SPIE 6989, Photonic Crystal Materials and Devices VIII, 698915 (21 April 2008);

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