Cryogenic platform for optically detected magnetic resonance of single quantum emitters

• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: Funded in 2025
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 555846033

This proposal describes an equipment that enables combined optical and magnetic resonance studies on single quantum emitters in the solid state. It will permit optical microscopy of single emitters at a temperature level of <2 Kelvin and under a magnetic field of up to 7 Tesla. A platform offering comparable measurement conditions is not yet available at the University of Bonn. This equipment will support a line of ongoing and planned research projects, particularly in the Excellence Cluster “Matter and Light for Quantum Computing (EXC ML4Q)” and its extension proposal. Specifically, research efforts will be carried out on interfacing defect-bound electron and nuclear spins in solid with flying photons. The primary classes of emitters to study are polycyclic aromatic hydrocarbon molecules and gate-defined emitters in two-dimensional materials. The research that this equipment enables could deepen our understanding of electron and nuclear spin dynamics in solids at the single-emitter scale, and enable the construction of quantum spin-photon interfaces, which are crucial components for quantum repeaters and networks.

• DFG Programme: Major Research Instrumentation
• Major Instrumentation: Kryogene Plattform für optisch detektierte magnetische Resonanz einzelner Quantenemitter
• Instrumentation Group: 8550 Spezielle Kryostaten (für tiefste Temperaturen)
• Applicant Institution: Rheinische Friedrich-Wilhelms-Universität Bonn
• Leader: Professor Dr. Daqing Wang