@article{FuchsStenderTrupkeetal.2015, author = {Fuchs, F. and Stender, B. and Trupke, M. and Simin, D. and Pflaum, J. and Dyakonov, V. and Astakhov, G.V.}, title = {Engineering near-infrared single-photon emitters with optically active spins in ultrapure silicon carbide}, series = {Nature Communications}, volume = {6}, journal = {Nature Communications}, number = {7578}, doi = {10.1038/ncomms8578}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-148502}, year = {2015}, abstract = {Vacancy-related centres in silicon carbide are attracting growing attention because of their appealing optical and spin properties. These atomic-scale defects can be created using electron or neutron irradiation; however, their precise engineering has not been demonstrated yet. Here, silicon vacancies are generated in a nuclear reactor and their density is controlled over eight orders of magnitude within an accuracy down to a single vacancy level. An isolated silicon vacancy serves as a near-infrared photostable single-photon emitter, operating even at room temperature. The vacancy spins can be manipulated using an optically detected magnetic resonance technique, and we determine the transition rates and absorption cross-section, describing the intensity-dependent photophysics of these emitters. The on-demand engineering of optically active spins in technologically friendly materials is a crucial step toward implementation of both maser amplifiers, requiring high-density spin ensembles, and qubits based on single spins.}, language = {en} }