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The integration of on-demand single photon sources in photonic circuits is amajor prerequisite for on-chip quantum applications. Among the varioushigh-quality sources, nanowire quantum dots can be efficiently coupled tooptical waveguides because of their preferred emission direction along theirgrowth direction. However, local tuning of the emission properties remainschallenging. In this work, we transfer a nanowire quantum dot on a bulk lithiumniobate substrate and show that its emission can be dynamically tuned byacousto-optical coupling with surface acoustic waves. The purity of the singlephoton source is preserved during the strain modulation. We further demonstratethat the transduction is maintained even with a SiO2 encapsulation layerdeposited on top of the nanowire acting as the cladding of a photonic circuit.Based on these experimental findings and numerical simulations, we introduce adevice architecture consisting of a nanowire quantum dot efficiently coupled toa thin film lithium niobate rib waveguide and strain-tunable by surfaceacoustic waves.

Dynamic strain modulation of a nanowire quantum dot compatible with a thin-film lithium niobate photonic platform