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Impact of antiphase boundaries on non-linear frequency conversion in GaP/Si microdisks

GaP is a promising candidate for the development of highly integrated photonic functions on silicon, because of its quasi lattice-matching with Si and its interesting χ(2) non-linear properties. We here present the realization of GaP-based microdisks on Si substrates, and discuss their optical properties. Especially, emphasis is given on the impact of crystal antiphase boundaries generated during the heteroepitaxial growth on second-harmonic generation.