Efficient telecom to visible wavelength conversion in doubly resonant GaP microdisks

Abstract

Resonant second harmonic generation between 1550 nm and 775 nm with outside efficiency $>4.4\times 10^{-4}{\text{mW}}^{-1}$ is demonstrated in a gallium phosphide microdisk cavity supporting high-$Q$ modes at visible ($Q\sim 10^4$) and infrared ($Q\sim 10^5$) wavelengths. The double resonance condition was satisfied through intracavity photothermal temperature tuning using $\sim 360\mu$W of 1550 nm light input to a fiber taper and resonantly coupled to the microdisk. Above this pump power efficiency was observed to decrease. The observed behavior is consistent with a simple model for thermal tuning of the double resonance condition.

arXiv comment6 pages, 4 figures

References in corpus (7)

• Naturally-phasematched second harmonic generation in a whispering gallery mode resonator
• Integrated high quality factor lithium niobate microdisk resonators
• Second harmonic generation in phase matched aluminum nitride waveguides
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• Second harmonic generation in GaP photonic crystal waveguides
• Second Harmonic Generation in Photonic Crystal Cavities in (111)-Oriented GaAs
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