Second harmonic generation in GaP photonic crystal waveguides

We demonstrate enhanced second harmonic generation in a gallium phosphide photonic crystal waveguide with a measured external conversion efficiency of 5 x 10(-7)/W. Our results are promising for frequency conversion of on-chip integrated emitters having broad spectra or large inhomogeneous broadening, as well as for frequency conversion of ultrashort pulses. (C) 2011 American Institute of Physics. [doi:10.1063/1.3607288]