biostudies-literatureSpinnler CBundesministerium für Bildung und Forschung (Federal Ministry of Education and Research)EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 Marie Skłodowska-Curie Actions (H2020 Excellent Science - Marie Skłodowska-Curie Actions)Swiss National Science FoundationDeutsch-Französische Hochschule (Franco-German University)European Research CouncilDeutsche Forschungsgemeinschaft (German Research Foundation)Danmarks Grundforskningsfond (Danish National Research Foundation)9509https://www.ebi.ac.uk/biostudies/studies/S-EPMC11535015biostudies-literatureUnknown15(1)A promising route towards the deterministic creation and annihilation of single-phonons is to couple a single-photon emitter to a mechanical resonator. The challenge lies in reaching the resolved-sideband regime with a large coupling rate and a high mechanical quality factor. We achieve this by coupling self-assembled InAs quantum dots to a small mode-volume phononic-crystal resonator with mechanical frequency Ω_m/2π = 1.466 GHz and quality factor Q_m = 2.1 × 10³. Thanks to the high coupling rate of g_ep/2π = 2.9 MHz, and by exploiting a matching condition between the effective Rabi and mechanical frequencies, we observe the interaction between the two systems via correlations in the emitted photons. Our results represent a major step towards quantuNature communicationsA single-photon emitter coupled to a phononic-crystal resonator in the resolved-sideband regime.PMC11535015200020204069Q.Link.X 16KIS0867200020_204069DNRF 139 Hy-QCDFA05-06TRR160DNRF 139, Hy-Q949043721394840453383065199Warburton RJNguyen GNZhai LScholz SWieck ADMidolo LWang YJavadi ALodahl PLudwig ASpinnler CErbe MfalseA single-photon emitter coupled to a phononic-crystal resonator in the resolved-sideband regime.A promising route towards the deterministic creation and annihilation of single-phonons is to couple a single-photon emitter to a mechanical resonator. The challenge lies in reaching the resolved-sideband regime with a large coupling rate and a high mechanical quality factor. We achieve this by coupling self-assembled InAs quantum dots to a small mode-volume phononic-crystal resonator with mechanical frequency Ω_m/2π = 1.466 GHz and quality factor Q_m = 2.1 × 10³. Thanks to the high coupling rate of g_ep/2π = 2.9 MHz, and by exploiting a matching condition between the effective Rabi and mechanical frequencies, we observe the interaction between the two systems via correlations in the emitted photons. Our results represent a major step towards quantu2024-01-01T00:00:00Z2024 Nov2025-04-04T02:46:38.867Z2025-04-04T02:46:38.867ZS-EPMC115350153949662010.1038/s41467-024-53882-2