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Frequency doubling and parametric fluorescence in a four-port aluminum gallium arsenide photonic chip

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Abstract

In this Letter, we report on the fabrication and characterization of a monolithic III–V semiconductor photonic chip, designed to perform nonlinear parametric optical processes for frequency conversion and non-classical state generation. This chip co-integrates an AlGaAs microdisk that is evanescently coupled to two distinct suspended waveguides designed for light injection and collection around 1600 nm and 800 nm, respectively. Quasi-phase matching provided by the resonator geometry and material symmetry, resonant field enhancement, and confinement ensure efficient nonlinear interactions. We demonstrate second-harmonic generation efficiency of $5\% {{\rm W}^{- {1}}}$ and a biphoton generation rate of 1.2 kHz/µW through spontaneous down-conversion.

© 2020 Optical Society of America

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