On-chip Moiré Single-Photon Emitters for Quantum Communications (SINPHONI)

Future quantum technologies need on-demand, indistinguishable single photons with high efficiency, purity, integrated on chip-scale and low-cost platforms. We will realize scalable arrays of active and robust single-photon emitters (SPEs) in moiré superlattices of two-dimensional transition-metal dichalcogenides (TMDs). Interestingly, atomically thin TMD heterostructures combine strong excitonic interactions, mechanical flexibility, and compatibility with photonic integration, while their moiré potentials localize excitons into quantum-dot-like states that emit quantum light in the near-infrared. Our approach integrates strain-programmable moiré SPEs with thin-film piezoelectric actuators. Static and dynamic strain (including surface acoustic waves) will be used to reversibly tune the emission energy, polarization, and brightness of the SPEs at the device level while preserving single-photon purity. We will fabricate twisted WSe₂/WS₂ and WSe₂/MoSe₂ superlattices, couple selected emitters to dielectric microcavities for efficient light collection and implement independent electrical addressing of many sources on a single chip. By combining advanced nanofabrication, micro-/nano-PL with time resolution, ultrafast pump–probe spectroscopy, and predictive theory, we will establish a methodological framework for reproducible and tunable quantum emitters in TMDs. The outcome will be a compact chip hosting multiple, independently controllable moiré SPEs for scalable photonic circuits in quantum communication and information processing.