Speaker
Description
We employ an isolated nitrogen–vacancy (NV) center as a quantum sensor to probe localized stress in a bulk diamond crystal and to measure magnetic fields, enabled by a monolithic inverse-designed photonic structure. This design allows efficient optical excitation of individual NV centers in a bulk sample and significantly enhances photon collection by engineering interference of the emitted light at the diamond–air interface. The resulting increase in collection efficiency improves the ODMR signal contrast and sensing sensitivity, while enabling reliable optical readout of single NV centers in bulk diamond. By integrating inverse-designed with quantum-defect-based sensing in bulk diamond, our approach provides a scalable platform for high-sensitivity, nanoscale quantum sensing, with potential applications in geosciences, biomedicine, and advanced materials characterization.
| Keyword-1 | Quantum sensing |
|---|---|
| Keyword-2 | NV center |