Efficient telecom to visible wavelength conversion in doubly resonant gallium phosphide microdisks

Agradecimentos: We would like to thank Aaron C. Hryciw and J. P. Hadden for their assistance with this project. This work was supported by NRC, CFI, iCORE/AITF, NSERC, and CNPq Abstract: Resonant second harmonic generation between 1550 nm and 775 nm with normalized outside efficiency > 3.8 × 10 - 4 mW - 1 is demonstrated in a gallium phosphide microdisk supporting high-Q modes at visible (Q ~ 10 4) and infrared (Q ~ 10 5) wavelengths. The double resonance condition is satisfied for a specific pump power through intracavity photothermal temperature tuning using ~ 360 µ W of 1550 nm light input to a fiber taper and coupled to a microdisk resonance. Power dependent efficiency consistent with a simple model for thermal tuning of the double resonance condition is observed CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ Aberto