Dolde, F.Doherty, MarcusMichl, JuliaJakobi, IngmarNaydenov, BorisSebastien, PezzagnaMeijer, JanNeumann, PJelezko, FedorManson, NeilWrachtrup, J2015-12-100031-9007http://hdl.handle.net/1885/69749Single charge nanoscale detection in ambient conditions is a current frontier in metrology that has diverse interdisciplinary applications. Here, such single charge detection is demonstrated using two nitrogen-vacancy (NV) centers in diamond. One NV center is employed as a sensitive electrometer to detect the change in electric field created by the displacement of a single electron resulting from the optical switching of the other NV center between its neutral (NV0) and negative (NV-) charge states. As a consequence, our measurements also provide direct insight into the charge dynamics inside the material.Author/s retain copyrightKeywords: Ambient conditions; Charge detection; Charge dynamics; Charge state; Nanoscale detection; Nitrogen vacancies; Optical switching; Single electron; Electric fields; Optical resonators201410.1103/PhysRevLett.112.0976032024-03-03