Acoustic Modulation\nof Individual Nanowire Quantum\nDots Integrated into a Hybrid Thin-Film Lithium Niobate Photonic Platform

Surface acoustic waves are a powerful tool for controlling\nquantum\nsystems, including quantum dots (QDs), where the oscillating strain\nfield can modulate the emission wavelengths. We integrate InAsP/InP\nnanowire QDs onto a thin-film lithium niobate platform and embed them\nwithin Si<sub>3</sub>N<sub>4</sub>-loaded waveguides. We achieve a\n0.70 nm peak-to-peak wavelength modulation at 13 dBm using a single\nfocused interdigital transducer (FIDT) operating at 400 MHz, and we\ndouble this amplitude to 1.4 nm by using two FIDTs as an acoustic\ncavity. Additionally, we independently modulate two QDs with an initial\nwavelength difference of 0.5 nm, both integrated on the same chip.\nWe show that their modulated emissions overlap, demonstrating the\npotential to bring them to a common emission wavelength after spectral\nfiltering. This local strain-tuning represents a significant step\ntoward generating indistinguishable single photons from remote emitters\nheterogeneously integrated on a single chip, advancing on-chip quantum\ninformation processing with multiple QDs.