2025/03/18 by Boaz Lubotzky, Hamza Abudayyeh, Lubotzky, Boaz +7 · 1 citation
Engineering · Materials Science · Medicine · #Diamond and Carbon-based Materials Research #FOS: Physical sciences #Optics (physics.optics) #Photoacoustic and Ultrasonic Imaging #Radiation Therapy and Dosimetry
paper · pdf · doi:10.48550/arxiv.2503.14761
openalex publication_date 2025/03/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Efficient readout of nitrogen-vacancy (NV) centers in diamond is crucial for various quantum information technologies. However, achieving high-fidelity, single-shot readout at room temperature remains challenging due to limited photon collection efficiency (CE) and background noise. In this work, we enhance the readout efficiency of NV centers by integrating them into hybrid metal-dielectric bullseye nanoantennas using ultra-precise deterministic positioning. This approach enables highly directional emission while minimizing optical losses, resulting in a measured CE of 82% into a numerical aperture (NA) as low as 0.5, and approaching unity for NA>0.8. This marks a substantial improvement over previous realizations using nanodiamonds, highlighting the advantage of combining hybrid nanoantennas with precise positioning. Our results mark a substantial advancement towards efficient single-shot readout of NV centers by significantly improving readout fidelity and efficiency in a simple on-chip configuration.