Multiply Resonant Photonic Crystal Cavities For Nonlinear Frequency Conversion

We describe a photonic crystal nanocavity with multiple spatially overlapping resonances that can serve as a platform for nonlinear frequency conversion. We show nonlinear characterization of structures with two resonances nearly degenerate infrequency. We also demonstrate structures with resonances separated by up to 592 nm. (C)2011 Optical Society of America