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A hybrid device comprising a (Al)GaAs quantum dot heterostructure and aLiNbO$_3$ surface acoustic wave resonator is fabricated by heterointegration.High acoustic quality factors $Q>4000$ are demonstrated for an operationfrequency $f\approx 300$ MHz. The measured large quality factor-frequencyproducts $Q\times f>10^{12}$ ensures the suppression of decoherence due tothermal noise for temperatures exceeding $T>50\,\mathrm{K}$. Frequency andposition dependent optomechanical coupling of single quantum dots and theresonator modes is observed.

A Hybrid (Al)GaAs-LiNbO$_3$ Surface Acoustic Wave Resonator for Cavity Quantum Dot Optomechanics