Abstract

Whispering-gallery-mode microresonators, one of the most important components of photonic integrated circuits, have the ability to dramatically boost light–matter interactions. In this Letter, we demonstrate effective sum-frequency generation via modal phase matching in a triply resonant lithium-niobate-on-insulator microdisk resonator through two individual continuous wave pumps working in the communication band. The sum-frequency conversion efficiency is measured to be ${2.22} \times {{10}^{ - 6}}\;\,\,{{\rm mW}^{ - 1}}$. This work shows a high-efficiency frequency convertor that may be applied in on-chip integrated optics in the future.

© 2020 Optical Society of America

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