2025/01/21 by Yossef E. Panfil, Sarah Thompson, Panfil, Yossef E. +9 · 1 citation
Engineering · Materials Science · #Chalcogenide Semiconductor Thin Films #FOS: Physical sciences #Laser-Ablation Synthesis of Nanoparticles #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum Dots Synthesis And Properties #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2501.11812
openalex publication_date 2025/01/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report room-temperature observations of \mathrmCuZn-\mathrmVS quantum emitters in individual ZnS:Cu nanocrystals (NCs). Using time-gated imaging, we isolate the distinct, ∼3-μs-long, red photoluminescence (PL) emission of \mathrmCuZn-\mathrmVS defects, enabling their precise identification and statistical characterization. The emitters exhibit distinct blinking and photon antibunching, consistent with individual NCs containing two to four \mathrmCuZn-\mathrmVS defects. The quantum emitters' PL spectra show a pronounced blue shift compared to NC dispersions, likely due to photochemical and charging effects. Emission polarization measurements of quantum emitters are consistent with a σ-character optical dipole transition and the symmetry of the \mathrmCuZn-\mathrmVS defect. These observations motivate further investigation of \mathrmCuZn-\mathrmVS defects in ZnS NCs for use in quantum technologies.